Ingredients
6 tbsp. butter, softened, plus more for pan
1 1/4 c. all-purpose flour, plus more for pan
3/4 c. sugar
1 large egg
1 c. sour cream
1 tsp. pure vanilla extract
1/4 tsp. baking soda
1/2 tsp. baking powder
1/2 tsp. cinnamon
1/4 tsp. kosher salt
1/2 c. brown sugar
1/4 c. sugar
2 tsp. cinnamon
1/2 tsp. kosher salt
3/4 c. butter, melted and cooled slightly
1 1/4 c. all-purpose flour
1/2 c. powdered sugar
2 tbsp. milk
Preparation
Step 1Preheat oven to 350°. Butter and flour a 9” cake pan.Step 2Make cake: In a large bowl using a hand mixer, beat butter and sugar together until light and fluffy. Add egg and mix until evenly combined. Add sour cream and vanilla and mix until evenly combined. Add flour, baking soda, baking powder, cinnamon, and salt. Stir gently until just combined, then pour batter into prepared pan. Step 3Make streusel: In a medium bowl, whisk together brown sugar, sugar, cinnamon, and salt. Add butter and stir until smooth. Add flour and toss the mixture together until large moist crumbs form. Sprinkle crumb mixture on top of batter. Step 4Bake until a toothpick inserted into the center of the cake comes out clean, about 35 minutes. Let cool for at least 15 minutes. Step 5Make glaze: In a small bowl, whisk together powdered sugar and milk until smooth. Step 6Drizzle glaze over cake, then slice into wedges and serve.
