The Preparation
Preheat oven to 350F.
Mix yogurt, sugar, oil, and eggs together.
Add flour, baking powder, and salt. Mix until combined.
Pour half the batter into a greased baking pan.
Sprinkle cinnamon and brown sugar mixture over the first layer of batter.
Add remaining batter on top.
Make streusel topping by combining butter, flour, brown sugar, and cinnamon. Crumble over top.
Bake at 350F for approximately 55 minutes until a toothpick comes out clean.
