• Preheat oven to 350° and prepare a 9 x 5 baking pan by spraying with a non stick cooking spray.

For The Streusel Topping

• To make streusel topping, combine cinnamon, flour, brown sugar, and butter in a medium-sized bowl.
• Use a pastry cutter or fork to cut the butter into the mixture. Set aside.

For The Center

• In a small bowl, combine cinnamon and brown sugar. Set aside.

For The Cake

• Sift flour, baking soda, baking powder, and salt together in a small bowl.
• Using a stand or hand mixer on medium speed, beat butter and sugar until fluffy and well combined.
• Add eggs, one at a time, making sure to beat mixture in between each egg. Add vanilla and beat until combined.
• Next, add half of the flour mixture, followed by the sour cream, and finished with the last of the flour mixture. Make sure to mix well in between each addition.
• Now, pour half of the batter into your prepared pan.
• Evenly sprinkle the center mixture over cake batter and top with remaining batter.
• Sprinkle top of cake batter with streusel topping.
• Bake in oven for 40-50 minutes or until the cake is golden brown and a toothpick inserted in the center comes out clean.
• Remove from oven and let cool.