Microwave Brownie Cake - cooking recipe

Ingredients

3 tablespoons chocolate chips, or to taste
2 tablespoons butter
2 tablespoons packed brown sugar
1 tablespoon white sugar
salt
1 pinch baking soda
1 splash vanilla extract
1 egg yolk
1/4 cup all-purpose flour

Preparation

Microwave chocolate chips and butter in a microwave-safe mug until melted, about 20 seconds. Add brown sugar, white sugar, salt, baking soda, and vanilla extract; mix together until combined. Stir in egg yolk. Add flour; mix until batter is blended and smooth.
Cook in the microwave until crust forms but center is still fudgy, about 35 seconds. Add 5 to 10 seconds for a drier consistency.