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In a microwave-safe mug, combine the dry ingredients: all-purpose flour, granulated sugar, unsweetened cocoa powder, and baking soda.

Use a fork to briefly whisk and incorporate these dry ingredients together in the mug until well combined.

Add the wet ingredients to the mug: white vinegar, vanilla extract, and water.

Thoroughly mix all ingredients together with the fork until a smooth batter is formed, scraping down the sides of the mug as needed.

Place the mug in the microwave and cook in 30-second increments for a total of approximately 70 seconds, or until the cake is set and springs back slightly when touched.


In a microwave-safe mug, combine the dry ingredients: all-purpose flour, granulated sugar, unsweetened cocoa powder, and baking soda.

Use a fork to briefly whisk and incorporate these dry ingredients together in the mug until well combined.

Add the wet ingredients to the mug: white vinegar, vanilla extract, and water.

Thoroughly mix all ingredients together with the fork until a smooth batter is formed, scraping down the sides of the mug as needed.

Place the mug in the microwave and cook in 30-second increments for a total of approximately 70 seconds, or until the cake is set and springs back slightly when touched.
