Jersey Apple Cake with Cinnamon Streusel Topping

Preheat oven to 350°F (175°C). Grease and flour a 9-inch springform pan.

In a large bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg (if using).

In a separate bowl, cream together softened Jersey butter, granulated sugar, and brown sugar until light and fluffy.

Beat in eggs one at a time, then stir in vanilla extract.

Gradually add the dry ingredients to the wet ingredients, alternating with the Jersey milk, beginning and ending with the dry ingredients. Mix until just combined.

Fold in the diced Jersey apples and the riced/grated Jersey Royal potato.

Prepare the streusel: In a medium bowl, combine flour, brown sugar, and cinnamon. Cut in the cold, cubed Jersey butter using a pastry blender or your fingers until the mixture resembles coarse crumbs.

Pour the batter into the prepared springform pan.

Sprinkle the cinnamon streusel evenly over the top of the batter.

Bake for 45-50 minutes, or until a wooden skewer inserted into the center comes out clean. If the streusel begins to brown too quickly, tent the cake with foil.

Let the cake cool in the pan for 10-15 minutes before releasing from the springform pan. Cool completely on a wire rack before serving.