Cookie Butter Mug Cake

10 seconds after I saw this video I was already mixing together butter, cookie butter, sugar and so on. Every since I heard of microwave cakes I was intrigued! My first attempts to make brownies in the microwave were all quite disappointing as they were all quite spongy, even when the recipes claimed they wouldn't be.
This cake was a pleasant surprise and I call it a success! It still can't compete with a real cake, but for 3 minutes of work it is a worthy little snack.
I added chocolate chips :)

2 tbsp butter
2 tbsp cookie butter
1 tsp vanilla extract
1 egg
2 tbsp sugar
4 tbsp flour
1/4 tsp baking powder
1/3 cup dark chocolate chips
pinch of salt
In a 2 cup Pyrex dish, melt the butter in the microwave. Add the remaining ingredients and combine well.
"Bake" in the microwave for 90 seconds.
Serve hot with whipped cream on top.