Apple Cinnamon Cake with Strawberry Puree Recipe

Ingredients
For the Cake:
2 cups all-purpose flour
1 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1 tsp ground cinnamon
1/4 tsp nutmeg (optional)
1/2 cup unsalted butter, softened
3/4 cup granulated sugar
1/4 cup brown sugar, packed
2 large eggs
1 tsp vanilla extract
1/2 cup buttermilk or plain yogurt