Mash the banana in a bowl with a fork or directly into your mug cake.
Add the sugar, eggs and vanilla and mix with a fork until smooth.
Add the flour, baking powder and chocolate chips and mix again to incorporate.
Microwave the banana mug cake for 1.5 minutes until the center is set.
1. Even Mixing: Ensure that all ingredients are mixed well to avoid pockets of flour or uneven cooking. Using a fork can help incorporate everything smoothly. 2. Check Your Mug Size: Use a microwave-safe mug that can hold at least 12 ounces to prevent the batter from spilling over as it cooks. 3. Watch the Cooking Time: Microwaves can vary in power, so start with the minimum recommended cooking time and add additional time in short increments if needed. Overcooking can lead to a dry mug cake. 4. Don't Fill the Mug to the Top: Only fill your mug about halfway to give the cake room to rise without overflowing. 5. Test for Doneness: Just like regular cakes, insert a toothpick or a fork into the center. If it comes out clean or with a few crumbs (and not wet batter), your mug cake is done!
Serve with vanilla ice cream or whipped cream.