Hazelnut Streusel Buttermilk Coffee Cake

Streusel (already included in the ingredient list above):
3/4 cup packed brown sugar
1/2 cup chopped hazelnuts
2 teaspoons ground cinnamon
3 tbsp butter, softened

Mix all streusel ingredients together in a small bowl until soft and crumby.

Preheat oven to 350.

Cream remaining butter and sugar together in your mixer. Add eggs slowly, one at a time, to butter and sugar mixture until soft and fluffy.

In a separate bowl, combine remaining dry ingredients.

Add dry ingredients and buttermilk, alternating slowly, into batter until all the dry ingredients are incorporated.

Pour half of the batter into a buttered, floured bundt pan. Sprinkle 1/2 of streusel mix over the batter. Swirl two layers together lightly with a butter knife.

Pour remaining batter into pan and again top with remaining streusel and again swirl with knife.

Bake at 350 for 45-60 minutes, or until a toothpick inserted in the cake comes out clean.