Step 1

Preheat the oven to 350 degrees. Lightly grease a 9×5” loaf pan and set aside.

Step 2

In a large bowl or the bowl of a stand mixer, cream together the butter, oil, sugar, and brown sugar on medium speed until smooth, about one minute. Add the eggs and vanilla and beat to combine. Add 1 cup of the flour, the baking powder, baking soda, and salt and beat on low just until almost combined. Add the buttermilk, stir, and then mix in the remaining flour. Beat on low until the batter is smooth and uniform, but do not over-mix. Combine the brown sugar and cinnamon for the filling in a small bowl. Spoon half of the batter into the prepared pan and smooth. Top with the streusel. Add the remaining batter and smooth. Finally, prepare the streusel. Combine the flour, brown sugar, cinnamon and salt in a small bowl. Stir in the melted butter, just until clumps form. Sprinkle on top. Bake in the pre-heated oven about 50-60 minutes or until the top is domed and a toothpick inserted comes out clean.