Course: Dessert
Cuisine: American
Keyword: gluten-free mug cake, lemon cake in a mug, lemon mug cake, microwave lemon cake
Lemon icing - If you don't have lemon curd or don't want to make it, you can easily make a lemon royal icing. Mix together 2 tablespoons of powdered sugar with a teaspoon of lemon juice until well combined and drizzle over the warm cake.