Chocolate Chip Mug Cake Recipe

I know the feeling of wanting a decadent dessert right now, but not wanting to bake a whole batch of cookies or cake. This easy chocolate chip mug cake recipe with a molten caramel core gives you a bakery-quality treat in minutes. It’s my favorite solution for a late-night craving, and it’s also a family-friendly dessert that feels special without any fuss. We’re upgrading a basic mug cake by adding a gooey, homemade salted caramel core that melts right into the center as it cooks. This recipe transforms simple pantry staples into a decadent experience right in your microwave, making it the perfect individual portion for a cozy evening.

Ingredients

For the Salted Caramel Core

• 60 g (1/4 cup) granulated sugar: Provides the base sweetness for the caramel sauce. Use standard white sugar; avoid substitutes as they will not caramelize properly. This sugar is separate from the amount used for the cake batter.
• 30 ml (2 tablespoons) water: Helps dissolve the sugar and ensure even melting and caramelization. Precise measurement is important here for consistency.
• 28 g (2 tablespoons) unsalted butter, cubed: Adds richness and helps stop the caramelization process when added. Ensure the butter is unsalted for control over the final flavor; cubed helps it melt quickly and integrate smoothly.
• 60 ml (1/4 cup) heavy cream or full-fat coconut cream: Creates the rich, creamy texture of the caramel sauce. Use cold cream; a slightly lower temperature helps stop the cooking process and create a smooth sauce. Full-fat coconut cream (the thick part from a chilled can) is an excellent dairy-free alternative.
• 1/4 teaspoon flaky sea salt, plus more for garnish: Balances the sweetness and enhances all the flavors. Flaky sea salt (like Maldon) provides a superior texture and flavor burst compared to standard table salt.
• 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract: Adds warmth and depth to the caramel and cake. Alcohol-free vanilla extract is often preferred for microwave cooking as it prevents harsh flavors from developing.

For the Chocolate Chip Mug Cake Batter

• 60 g (1/2 cup) all-purpose flour: The structural base for the cake; creates a light, fluffy texture when mixed correctly. Use standard all-purpose flour; for a gluten-free option, substitute a 1:1 gluten-free baking blend.
• 30 g (2 tablespoons) granulated sugar: Provides sweetness for the cake batter itself. This is in addition to the sugar used for the caramel sauce; a slightly lower amount prevents an overly sweet cake.
• 2.5 g (1/2 teaspoon) baking powder: The leavening agent that makes the chocolate chip mug cake rise and keeps it fluffy. Ensure your baking powder is fresh for optimal rise (test by dropping a pinch in hot water).
• 1 g (1/4 teaspoon) salt: Enhances the chocolate flavor and balances the sweetness of the cake.
• 60 ml (1/4 cup) milk (dairy or plant-based): Provides moisture and tenderness to the cake. Any milk variety works well (dairy, almond, oat); full-fat dairy milk yields a richer result.
• 30 ml (2 tablespoons) vegetable oil: Provides a soft crumb and prevents the cake from becoming dry in the microwave. Use a neutral-flavored oil like canola or sunflower oil; melted butter can be substituted for extra flavor.
• 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract: Boosts the overall flavor profile of this chocolate chip mug cake recipe.
• 30 g (2 tablespoons) chocolate chips (milk or dark): Provides pockets of melted chocolate throughout the cake. Milk chocolate chips offer a creamier result, while dark chocolate chips provide a more intense flavor contrast.

Optional (plan-ahead): If you’re shopping for the week, I put this into a 4-Week Meal Plan + Grocery Lists so dinner’s already decided before your day gets busy.

Instructions

Here’s how to create this simple yet impressive dessert. It’s important to follow the steps precisely to get that signature molten core and fluffy texture.

1. Prepare the Molten Salted Caramel Sauce: In a small, heavy-bottomed saucepan, combine the 60 g (1/4 cup) granulated sugar and 30 ml (2 tablespoons) water. Heat over medium-high heat *without stirring* (swirling the pan occasionally), until the sugar melts and turns a deep amber color, about 5-7 minutes. Watch carefully—caramel can burn quickly; remove immediately from heat when a rich, golden-brown color is achieved.
2. Finish the Caramel Sauce: Immediately remove the pan from the heat and carefully add the cubed unsalted butter, whisking until fully melted and incorporated. Then, slowly pour in the 60 ml (1/4 cup) heavy cream, whisking continuously until smooth (the mixture will bubble vigorously). Stir in 1/4 teaspoon flaky sea salt and 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract, then set aside to cool to room temperature; it will thicken significantly as it cools.
3. Mix Dry Ingredients: In a microwave-safe mug (approximately 350 ml / 12 oz capacity), whisk together 60 g (1/2 cup) all-purpose flour, 30 g (2 tablespoons) granulated sugar, 2.5 g (1/2 teaspoon) baking powder, and 1 g (1/4 teaspoon) salt until well combined. Using a fork or small whisk helps break up any lumps of baking powder. Ensure the mug is large enough to prevent overflow when the chocolate chip mug cake rises (at least 12 oz capacity).
4. Add Wet Ingredients: In a separate small bowl, whisk together 60 ml (1/4 cup) milk, 30 ml (2 tablespoons) vegetable oil, and 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract. Pour the wet ingredients into the mug with the dry ingredients. Mix with a fork or small whisk until *just combined* and no streaks of flour remain; avoid overmixing, which can lead to a rubbery texture.
5. Create the Molten Core: Gently fold in 30 g (2 tablespoons) chocolate chips, distributing them evenly in the batter. Create a small indentation in the center of the batter using the back of a spoon. Spoon 1 tablespoon of the *cooled and thickened* salted caramel sauce into this indentation to form the molten core. I learned early on to make sure the caramel is quite firm before adding it, or it will simply dissolve into the batter instead of staying put for that perfect molten center.
6. Microwave and Rest: Microwave the mug cake on high for 60-90 seconds, or until the cake is set around the edges but still slightly moist in the center. Cooking time varies greatly based on microwave wattage (start with 60 seconds for high-wattage microwaves, add 10-15 second increments if needed). Carefully remove the mug from the microwave and let it rest for 1 minute; this allows the chocolate chip mug cake to finish cooking and firm up slightly. If it comes out rubbery, next time reduce the cooking time by 10 seconds.
7. Serve with Toppings: Drizzle the remaining warm salted caramel sauce generously over the top of the cake, allowing thick, glossy ribbons to cascade down the sides. Finish with a delicate sprinkle of additional flaky sea salt directly onto the caramel for sparkle and an enhanced sweet-salty flavor.

Troubleshooting: Getting a Perfect Molten Center

Getting the perfect gooey center on your chocolate chip mug cake recipe can be tricky if you’re not careful. Here are some of the most common issues and how to fix them to ensure a decadent, soft center every time.

• Overmixing is the enemy of a fluffy mug cake. When combining wet and dry ingredients, stop mixing as soon as the last streaks of flour disappear to keep the texture light.
• Don’t add the core until the batter is in the mug. Place the caramel dollop right in the middle after the batter is mixed; this ensures the sauce stays contained during cooking.
• Use cooled caramel sauce. If the caramel sauce is hot when added, it will immediately melt and spread into the batter, preventing the distinct molten center effect.
• Watch for microwave wattage. Microwave wattage varies widely; start low (60 seconds) and check every 10-15 seconds to ensure the edges are set but the center remains soft.

Make-Ahead Tips and Variations

This chocolate chip mug cake recipe is all about convenience. Here are a few ways to prepare ahead or change up the flavors to match what you’re craving today.

• Prep the caramel ahead of time. The caramel sauce can be made up to a week in advance and stored in an airtight container in the refrigerator. Reheat gently before serving.
• Use store-bought caramel sauce for speed. If you are truly short on time, you can substitute 1 tablespoon of high-quality, pre-made caramel sauce in the center.
• Add different flavor pairings. Try substituting peanut butter, hazelnut spread (Nutella), or a dollop of raspberry jam for the caramel core for a new flavor combination.
• Double the recipe for two. Simply double the ingredients in a slightly larger mug or two separate mugs; increase microwave time slightly and check doneness carefully.

FAQs

Q: Can I bake this chocolate chip mug cake in the oven instead?

A: Yes, you can bake this in an oven using an oven-safe ramekin (8 oz size). Preheat to 350°F (175°C) and bake for 12-15 minutes, or until a toothpick inserted near the edge comes out clean.

Q: Why did my mug cake get rubbery or tough?

A: The two main causes are overmixing the batter (developing too much gluten) or overcooking it in the microwave (drying it out). Stick to the recommended cooking time and avoid over-stirring the ingredients.

Q: Can I make this chocolate chip mug cake gluten-free?

A: Yes, substitute a 1:1 gluten-free all-purpose baking blend for the standard flour. Results may vary slightly depending on the brand, but it works well in most cases.

Q: Can I use pre-made caramel sauce for the core?

A: Yes, but ensure it is thick enough to create a distinct center. If it’s too runny, it will simply dissolve into the batter. If using store-bought caramel, choose one that’s designed for ice cream toppings, not thin syrups.

Q: What size mug should I use for this recipe?

A: A standard 12 oz (350 ml) mug is ideal. If you use a smaller mug (8 oz), reduce the recipe ingredients slightly to prevent overflow when the cake rises in the microwave.

Q: How can I make this a high-protein snack for healthy eating?

A: I sometimes swap half of the flour for a high-quality vanilla protein powder in this chocolate chip mug cake recipe. You may need to add an extra tablespoon of milk or oil to maintain moisture, as protein powder can dry out the cake when cooked.

Q: How do I store leftovers for meal prep?

A: This chocolate chip mug cake recipe is best when eaten fresh. The caramel sauce, however, stores perfectly in an airtight container in the refrigerator for up to a week. For leftovers, reheat in the microwave for 15-20 seconds to warm through, but expect a slightly less moist result.

Conclusion

This easy chocolate chip mug cake recipe with a molten caramel core proves that quick desserts don’t have to be boring or overly complex. It offers the perfect combination of speed and decadence, creating a bakery-quality experience in minutes. Pin this recipe for later and try it tonight!

chocolate chip mug cake recipe

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• Author: Madison Clarke
• Total Time: 12 minutes
• Yield: 1 serving 1x
• Diet: General

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Description

An easy chocolate chip mug cake recipe featuring a molten salted caramel core, designed for a quick, single-serving dessert made in the microwave.

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Ingredients

Scale 1x2x3x

• 60 g (1/4 cup) granulated sugar, for caramel
• 30 ml (2 tablespoons) water, for caramel
• 28 g (2 tablespoons) unsalted butter, cubed
• 60 ml (1/4 cup) heavy cream or full-fat coconut cream
• 0.25 teaspoon flaky sea salt, plus more for garnish
• 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract, for caramel
• 60 g (1/2 cup) all-purpose flour
• 30 g (2 tablespoons) granulated sugar, for cake batter
• 2.5 g (1/2 teaspoon) baking powder
• 1 g (1/4 teaspoon) salt
• 60 ml (1/4 cup) milk (dairy or plant-based)
• 30 ml (2 tablespoons) vegetable oil
• 2.5 ml (1/2 teaspoon) alcohol-free vanilla extract, for cake batter
• 30 g (2 tablespoons) chocolate chips (milk or dark)

Optional (plan-ahead): If you’re shopping for the week, I put this into a 4-Week Meal Plan + Grocery Lists so dinner’s already decided before your day gets busy.

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Instructions

1. Prepare Salted Caramel Sauce: In a small saucepan, combine 1/4 cup sugar and 2 tablespoons water. Heat over medium-high heat without stirring until the sugar melts and turns a deep amber color, about 5-7 minutes.
2. Finish Caramel Sauce: Remove from heat and carefully add the cubed unsalted butter, whisking until melted. Slowly pour in 1/4 cup heavy cream, whisking continuously. Stir in 1/4 teaspoon flaky sea salt and 1/2 teaspoon alcohol-free vanilla extract. Set aside to cool to room temperature; it will thicken significantly as it cools.
3. Mix Dry Ingredients: In a microwave-safe mug (at least 12 oz capacity), whisk together 1/2 cup all-purpose flour, 2 tablespoons granulated sugar, 1/2 teaspoon baking powder, and 1/4 teaspoon salt.
4. Add Wet Ingredients: In a separate small bowl, whisk together 1/4 cup milk, 2 tablespoons vegetable oil, and 1/2 teaspoon alcohol-free vanilla extract. Pour wet ingredients into the mug and mix until just combined, avoiding overmixing.
5. Create Molten Core: Gently fold in 2 tablespoons chocolate chips. Create a small indentation in the center of the batter and spoon 1 tablespoon of the cooled and thickened salted caramel sauce into the indentation.
6. Microwave and Rest: Microwave on high for 60-90 seconds, or until the edges are set and the center is slightly moist. Let rest for 1 minute before serving.
7. Serve with Toppings: Drizzle remaining warm salted caramel sauce over the top and garnish with additional flaky sea salt.

Notes

Ensure the caramel sauce is completely cooled before adding it to the batter to maintain the molten core; otherwise, it will dissolve into the batter. Avoid overmixing the cake batter to keep the cake light and fluffy. Microwave times vary based on wattage; adjust cooking time in 10-15 second increments if needed.

• Prep Time: 10 minutes
• Cook Time: 2 minutes
• Category: Dessert
• Method: Microwave
• Cuisine: American

Nutrition

• Serving Size: 1 mug cake
• Calories: 700 calories
• Sugar: 60 g
• Sodium: 250 mg
• Fat: 35 g
• Saturated Fat: 20 g
• Unsaturated Fat: 13 g
• Trans Fat: 0 g
• Carbohydrates: 80 g
• Fiber: 2 g
• Protein: 8 g
• Cholesterol: 70 mg