Ingredients
Method
Make the Streusel
- In a medium sized bowl, combine all the streusel ingredients except for the butter. Then add in the butter and use your fingers to mix it in by breaking it. It should be a crumbly texture. Set aside.6 tablespoon - brown sugar, ¾ cup - all-purpose flour, 6 tablespoon - cold butter, ¼ teaspoon - salt, 1 ½ teaspoon - ground cinnamon
Make the cake
- Preheat the oven to 325℉. Line a 8x8 baking pan with parchment and set aside.
- In a large bowl, whisk the flour, sugar, baking powder, baking soda and salt together.1¾ cup - all-purpose flour, 1¼ cup - granulated sugar, 1¼ teaspoon - baking powder, ¼ teaspoon - baking soda, ½ teaspoon - salt
- Add in the butter and oil to the flour mixture. Beat together until it resembles wet sand.¼ cup - butter, softened, ⅓ cup - oil
- In a separate small bowl, whisk together the sour cream, eggs, vanilla and milk until well combined.1 cup - sour cream, 2 - large eggs, 1 teaspoon - vanilla extract, 2 tablespoon - whole milk
- Add the wet ingredients to the flour mixture and beat together until it's smooth. If there appear to be lumps, smooth them out with a spatula.
- Pour in half the batter into the prepared baking pan. Evenly sprinkle a little more than half of the streusel mixture onto the batter.
- Now spoon the leftover batter all over the streusel mixture. Slowly and carefully, using an offset spatula, spread the batter to even it out. This might be a bit difficult because it sticks to the streusel mixture and wants to lift off. Try your best to even it out.
- Sprinkle the rest of the streusel on the evened out batter and bake for about 65-75 minutes, or until an inserted toothpick comes out fairly clean. Just a few crumbs on it.
- Take out and let cool completely.
- Slice into 9 equal pieces and enjoy!
