Apple Cake in an Iron Skillet

In a 9 to 10-inch skillet, melt 1 3/4 sticks butter over low heat. Add 3/4 cup sugar to the pan and stir around, then place apple slices, cut side down, in the pan. Don’t pack them too tightly, but try not to leave overly large gaps. Allow this to cook over low/medium-low heat while you make the cake batter. In the bowl of an electric mixer, beat 1 stick of butter and 2/3 cup sugar until light and fluffy. Mix in vanilla and eggs. Add sour cream and mix well. In a bowl, mix flour, baking powder, salt, and cinnamon. Stir together then gradually add flour mixture into the creamed mixture until just combined. Gently stir in 1 chopped apple.