In your microwave-safe mug, combine the almond flour (or ground nuts), cocoa powder, erythritol, pinch of stevia (if using), salt, and baking powder. Mix well with a fork or whisk to ensure there are no lumps.
Next, add the milk of your choice and the vanilla extract to the dry ingredients. Stir until you have a smooth batter. If you’re using liquid sweetener, remember to adjust the milk quantity to 2 tablespoons.
If you’re feeling indulgent, fold in a few chocolate chips or sugar-free chocolate chips for an added treat.
Microwave the mug for about 60 to 90 seconds, depending on your microwave's power. Start with 60 seconds, and if it’s not set, continue microwaving in 10-second intervals until it’s fully cooked. The cake should rise and look firm on top.
Allow the mug cake to cool for a minute or two before digging in. This helps set the texture and prevents burns.