Step 1: Prep the Mug
Choose a microwave-safe mug (approx 8-10 oz). Lightly coat the inside with non-stick cooking spray or a drop of coconut oil.efore cooking for visual appeal.Step 2: Mix Dry Ingredients
Add your flour, baking powder, sweetener, and flavor powders (cocoa or PB powder) directly into the mug. Whisk with a fork to remove clumps.Step 3: Add Wet Ingredients
Pour in the egg white, almond milk, and extracts. Whisk vigorously for 30 seconds. You want to incorporate air bubbles into the batter.Step 4: Fold in Mix-ins
Gently fold in your blueberries, chocolate chips, or sprinkles. Do not overmix here, or they will sink to the bottom.Step 5: The Microwave Method
Microwave on high for 45-60 seconds. Watch the mug! The cake will rise rapidly. It is done when the top looks set but slightly shiny.