Step #1 In a large bowl, nutmeg, flour, granulated sugar, mix brown sugar, & 2/3 c butter.
Step #2 Transfer 1 packed c of the sugar mixture to a small bowl.
Step #3 Add nuts & cinnamon, mixing well.
Step #4 To the mixture in the large bowl, buttermilk, baking powder, add egg, & baking soda; mix well.
Step #5 Pour batter into a buttered 9-inch cheesecake pan with removable rim.
Step #6 Sprinkle top cinnamon-nut mixture evenly over batter.
Step #7 Bake in a 350° oven until toothpick inserted in center comes out clean & cake begins to pull from pan sides, about 40 mins (about 35 mins in convection oven).
Step #8 Cool on a rack at least 20 mins.
Step #9 Remove pan rim.
Step #10 Serve warm or cool.
Enjoy the Cinnamon Streusel Buttermilk Coffee Cake recipe