The fastest and easiest dessert ever! It literally takes just minutes to prepare and cooks in just over 1 minute! I've made countless chocolate mug cakes and this one is my favorite.
Mix dry ingredients in a mug: Whisk flour, cocoa, sugar, baking soda in a medium microwave safe ceramic mug (at least 11 oz.).
Add wet ingredients: Add in milk, vanilla and mayonnaise.
Blend, add chocolate chips: Stir well with a fork to combine, while scraping along bottom and edges (especially bottom edges if it's not rounded). Sprinkle over chocolate chips.
Cook though in microwave: heat mixture in microwave on high power until just barely cooked through in the center, about 1 minute to 1 1/2 minutes. Let it cool for a minute or two it will be hot.
Optionally top: if desired served topped with vanilla or chocolate ice cream, or with whipped cream and shaved chocolate.
Notes
No greasing mug necessary. It's going to stick either way so just soak in water after finishing for easier clean up.
Be careful not to over-cook or mug cake will end up dry.
Enjoy within about 10 minutes of making for best texture.