Ingredients:
1/3 cup light brown sugar
1 teaspoon ground cinnamon
2/3 cup white sugar
1/2 cup butter, softened
2 eggs
1 1/2 teaspoons vanilla extract
1 1/2 cups all-purpose flour
1 3/4 teaspoons baking powder
Directions:
Preheat Oven & Prepare Pan: Preheat your oven to 350°F (175°C). Grease and flour a loaf pan (9×5 inches works great).
Make Cinnamon Sugar: In a small bowl, mix the brown sugar and cinnamon. Set aside.
Cream Butter and Sugar: In a large mixing bowl, cream together the butter, white sugar, and eggs until light and fluffy. Add the vanilla extract and mix again.
Add Dry Ingredients: In another bowl, whisk together the flour and baking powder. Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Layer the Batter: Pour half of the batter into the prepared loaf pan. Sprinkle half of the cinnamon-sugar mixture over the batter. Add the remaining batter on top and swirl with a knife or toothpick to create the cinnamon swirl.
Bake: Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Cool and Slice: Allow the loaf to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely. Slice and enjoy!