An Apple Coffee Cake

Make an apple coffee cake.

Ingredients:

1. 1 cup of flour

2. 1 teaspoon of baking powder

3. 1/2 teaspoon of salt

4. 1/2 cup of sugar

5. 1 teaspoon of ground cinnamon

6. 5 1/2 tablespoon of unsalted butter

7. 1 egg (beaten)

8. 1/2 cup of whole milk

9. 1 medium Cortland or other baking apple, peeled and sliced