1/4 cup plus 1.5 tsp flour
1 tbsp sugar
1/4 tsp baking powder
1/4 tsp ground cinnamon
pinch of salt
2 tbsp melted butter (can use half olive oil)
3 tbsp milk
1/2 tsp vanilla extract
3/4 tsp grated orange rind, optional
Add flour, sugar, baking powder, cinnamon and salt to a mug and stir together.
Add the milk, melted butter, vanilla extract, and orange rind, and stir until smooth.
Cook in microwave for 70-90 seconds (depends on power of microwave), until the cake is just set, but still moist on top. The cake will continue to bake while it cools. Allow to rest for 1 minute before eating.
2021 Good, quick. Original recipe called for 2 tbsp sugar. Use minimal salt if you are using salted butter.