Step 1

Preheat oven to 375°F. Spray a 9-inch round cake pan with cooking spray. Set aside.

Step 2

Prep the streusel: In a medium bowl, stir combine ⅔ cup Bisquick, ⅔ cup brown sugar and 1 teaspoon pumpkin pie spice. Use a pastry blender to cut in the butter until well combined and only small pieces of butter are visible. Stir in the pecans. Set aside.

Step 3

In a large bowl, whisk together the remaining Bisquick, brown sugar, and pumpkin pie spice. Stir in the sour cream, milk, egg, and vanilla until well combined.

Step 4

Spread half of the cake batter into the bottom of the greased cake pan. Sprinkle evenly with half of the streusel. Top evenly with the remaining cake batter, followed by the rest of the streusel.

Step 5

Bake for 30-35 minutes, or until a toothpick inserted into the cake comes out clean.