4 tablespoons all-purpose flour
1/4 teaspoon baking powder
2 teaspoons granulated sugar
3 tablespoons fat-free milk
1/2 tablespoon vegetable oil
1/4 teaspoon vanilla extract
1 teaspoon fresh lemon zest
1. Combine all cake ingredients except lemon zest in an oversized microwave-safe mug. Mix with a small whisk until batter is smooth.
2. Add lemon zest and mix until batter is smooth.
3. Cook in microwave for about 1 minute. If cake is not done, heat an additional 15 seconds.
Let cake cool a few minutes before eating. Cake is best consumed while still warm or within a few hours of it being cooked.