Dylan's Apple Cream Coffee Cake

1 . Stage

Preheat oven to 375 degrees F (190 degrees C). Generously grease a 10-inch tube pan with a removable bottom.

2 . Stage

Combine rolled oats, flax seeds, and 1/2 cup brown sugar in a bowl. Stir flour, cinnamon, baking powder, baking soda, and salt together in a separate bowl. Beat butter in a third large bowl with an electric mixer until creamy; beat 1/2 cup brown sugar and white sugar with butter until mixture is fluffy, about 5 minutes. Beat eggs, one at a time, into butter mixture, incorporating the first egg before adding the next one. Stir in vanilla extract.

3 . Stage

Stir flour mixture into butter mixture in several additions, alternating with sour cream and beating well after each addition, until batter is smooth. Stir 1 chopped apple into batter. Pour half the batter into prepared tube pan and spread 2 apples cut in slices over batter. Sprinkle half the oat mixture over apple slices. Pour remaining batter into tube pan and sprinkle remaining oat mixture over top of cake.

4 . Stage

Bake in the preheated oven until a toothpick inserted into the center of the cake comes out clean, about 40 minutes. Let cake stand in the pan for 30 minutes. Loosen sides of cake with a thin spatula or knife. Let cake cool completely and lift from pan.