Peanut Butter Chocolate Lava Mug Cake – craving something sweet and melty? This easy microwave mug cake recipe is ready in just minutes and delivers a soft, fudgy, gooey center filled with peanut butter and chocolate. Perfect for a quick dessert, late-night snack, or anytime you want rich chocolate peanut butter goodness without baking a full cake.
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In a microwave-safe mug, mix peanut butter with milk. Microwave for 10 seconds, then stir until creamy and smooth.
In a separate small bowl, whisk together flour, sugar, cocoa powder, baking powder, and salt.
Stir in milk, oil (or butter), and vanilla. Mix until smooth and ribbon-like in consistency.
Pour batter into the mug over the peanut butter base. Gently press peanut butter and chocolate chips into the center.
Cook on high for 65–80 seconds (depending on microwave power). The cake should rise and look set on top but stay soft inside.
Let cool for 1 minute, then sprinkle with flaky salt. Enjoy warm for the perfect gooey bite!
Add extra chocolate chips to the batter for more fudginess.
Swirl Nutella or cookie butter instead of peanut butter for flavor twists.
Drizzle with caramel or top with whipped cream for extra indulgence.
How do I know when it’s done?
The cake should rise and feel slightly firm on top but still soft in the center. For molten lava, it’s okay if a toothpick comes out slightly gooey.
Can I make this mug cake on the stove?
Yes! Use a small non-stick saucepan or a double boiler. Pour the batter in, cover with a lid, and cook on low heat for 4–6 minutes until the cake sets but stays soft inside.
Can I add extras like chocolate chips or nuts?
Definitely! Fold in extra chocolate chips, crushed peanuts, or walnuts for added texture and flavor.
Can I bake this in a conventional oven?
Absolutely! Preheat your oven to 180°C (350°F). Pour the batter into a small oven-safe ramekin and bake for 12–15 minutes. Check with a toothpick — it should come out slightly moist for a molten center.
Can I make this ahead of time?
This mug cake is best eaten fresh for the gooey center. You can refrigerate leftover batter up to 1 day, then microwave or bake before serving.
Can I use almond or oat milk instead of regular milk?
Yes, any milk works — dairy or plant-based. Almond, oat, or soy milk gives the same moist and soft texture.
How do I make a larger portion for 2 people?
Double the ingredients and split the batter into 2 mugs or ramekins. Cook separately for even results.
Can I use a different nut butter?
Yes! Cashew, almond, or even cookie butter can replace peanut butter for a different flavor.
Can I make this vegan?
Yes! Use plant-based milk, vegan chocolate chips, and vegetable oil instead of butter.
My cake turned rubbery. What went wrong?
Overcooking is usually the reason. Reduce microwave time or oven time slightly. Start checking 5–10 seconds earlier.
I’m Rajani, a passionate cook with over 15 years of experience creating delicious, approachable dishes. My love for food began in childhood, inspired by watching Sanjeev Kapoor’s Khana Khazana with my mom and helping her in the kitchen. On The Gourmet’s Hut, I share tried-and-tested authentic Indian recipes and quick microwave mug cake recipes perfect for busy days. My goal is to make cooking simple, flavorful, and fun—because food brings people together and every meal should create memories.
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