10-Min Fudgy Chocolate Cake
Microwave mug cake baked right in the serving bowl, then topped with a glossy fudge frosting made from cocoa, butter, and powdered sugar. Rich, gooey, and ready in under 10 minutes — no oven required.
- Total time
- 10 min
- Servings
- 2
- Calories
- 425
- Protein
- 6g

Ingredients
8 items — tap to check off
Missing one? Custrd suggests a swap that works.
Open the appInstructions
Step 1
Whisk flour, cocoa, sugar, egg, and milk in a microwave-safe bowl until smooth.
Step 2
Microwave on high for 3 minutes. The cake will rise and spring back when lightly touched.
Step 3
While cake cools, melt butter in a small bowl, then whisk in powdered sugar and cocoa.
Step 4
Spread fudgy frosting over the warm cake. The warmth will make it glossy and drippable.
Step 5
Serve warm straight from the bowl, or divide between plates and eat with a spoon.
Tools you’ll need
- microwave-safe bowl (8–10 oz capacity)
- small bowl
- whisk
- spoon
Cook smarter
Get matched recipes for what’s in your fridge
Custrd is an iPhone and Android app that finds real recipes from the ingredients you already have. No more grocery-list aspirations. Try it free for 7 days.



