Whisk first 3 wet ingredients together in a small mixing bowl until combined.
Stir in remaining dry ingredients.
Grease 2 ramekins or you can use a coffee mug. I used quiche ramekins which are more shallow.
Divided batter among 2 serving mugs or ramekins.
Cooking time will vary depending on your microwave wattage. Microwave one cake at a time 1 minute then check with a toothpick in center, if it comes out clean it's done if not cook another 30 seconds more then check again.
Allow to cool completely before frosting.
Not into microwave or don't have one? Bake these in a preheated oven at 350 degrees for 15 minutes.
Make the frosting by placing all ingredients into a stand mixer and blend until smooth. Taste and adjust sweetener if needed. Frost cake and enjoy!
Store any leftover cake in an airtight container in the fridge for up to 5 days.