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5-Minute Wacky Vegan Microwave Chocolate Cake for One

You absolutely will not believe how fast you can make the most decadent, moist, one-serving chocolate cake without eggs or milk. This is a variation of the famous wacky cake or crazy cake. It's sooo good! You stir all the ingredients and microwave it in a coffee cup. Try it. Seriously.

4.5 · 36 reviewsRecipe card by Wish I Could CookEditorial by recipesvibrant · Updated October 15, 2026
Lactose FreeLow ProteinVeganLow CholesterolEgg FreeHealthy
5-Minute Wacky Vegan Microwave Chocolate Cake for One

Total time

5 min

Servings

1

Calories

377.3

Category

Dessert

This 5-Minute Wacky Vegan Microwave Chocolate Cake for One is the ultimate emergency dessert for sudden cocoa cravings. Using a classic depression-era technique, this egg-free and dairy-free treat transforms pantry staples into a moist, portion-controlled indulgence in just minutes.

Ingredients

Makes 1 serving

  • 1/4 flour
  • 1/4 sugar
  • 1/2 baking soda
  • 1/4 salt
  • 1/8 white vinegar
  • 1/2 vanilla
  • 3/4 water

Method

  1. Stir together all the dry ingredients in a large coffee cup.

  2. Add wet ingredients and mix well with a fork.

  3. Microwave on 50% power for 3 minutes. (I think most microwaves are 1500 watts, so that's about the same as 750 watts for three minutes.) I always have my cup on the rotating plate. ENJOY!

Cook's notes

  • Use a large, microwave-safe mug with at least 12-16 ounce capacity to prevent the cake batter from bubbling over while it expands.
  • Ensure the vinegar and baking soda are well-incorporated to trigger the chemical reaction that provides the cake its lift without eggs.
  • Stick to 50% power settings; full wattage often leaves this specific batter rubbery or burnt before the center is set.
  • Check the cake by gently pressing the center; if it springs back slightly, it is finished, but let it rest for one minute to settle the crumb.

Easy swaps

  • Instead of white vinegar, use apple cider vinegarOffers a slightly more mellow acidity that reacts perfectly with the baking soda.
  • Instead of all-purpose flour, use oat flourCreates a slightly denser, nuttier texture suitable for those avoiding gluten.
  • Instead of white sugar, use coconut sugarAdds a subtle caramel-like depth of flavor to the chocolate profile.
  • Instead of water, use unsweetened soy milkIncreases the richness and fat content, resulting in a more decadent mouthfeel.

Frequently asked

Why use vinegar in this chocolate cake?

The vinegar reacts with the baking soda to create carbon dioxide bubbles, which acts as the leavening agent since this recipe contains no eggs.

Can I make this in a standard oven instead?

This recipe is specifically formulated for microwave heat cycles; oven baking would require different ratios and significantly longer times.

What if my microwave doesn't have a power level setting?

If you cannot adjust the power, cook in 30-second bursts at full power, checking the texture between each interval to prevent overcooking.

Is it normal for the cake to look wet on top?

A slight shine is normal, but if it looks liquid, give it an additional 30 seconds on 50% power until the surface looks set.

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