15-Min Chocolate Fudge Cake
Microwave mug cake layered with instant chocolate frosting — no mixer, no oven, ready in minutes. Stack two mugs for that tall-cake vibe and cover with fudgy frosting.
- Total time
- 15 min
- Servings
- 2
- Calories
- 485
- Protein
- 6g

Ingredients
7 items — tap to check off
Missing one? Custrd suggests a swap that works.
Open the appInstructions
Step 1
Mix flour, sugar, cocoa, baking powder, and a pinch of salt in a microwave-safe mug.
Step 2
Stir in milk and 2 tbsp melted butter until batter is smooth, no lumps.
Step 3
Microwave the mug on high for 2 minutes until cake rises and pulls away from sides.
Step 4
Repeat steps 1–3 in a second mug. Let both cool for 1 minute.
Step 5
Heat 2 tbsp butter and chocolate chips in a small bowl 30 seconds at a time, stirring until glossy.
Step 6
Slide one cake onto a plate, frost the top, stack the second cake on top, and frost the whole thing.
Tools you’ll need
- two microwave-safe mugs (12 oz each)
- microwave
- small mixing spoon
- small microwave-safe bowl
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.



