Bundt Coffee Cake with Cinnamon Swirl 
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Ingredients
– 2 1/2 cups all-purpose flour 
– 1 1/2 teaspoons baking powder 
– 1/2 teaspoon baking soda 
– 1/2 teaspoon salt 
– 1 cup unsalted butter, softened 
– 1 cup granulated sugar 
– 1/2 cup packed brown sugar 
– 4 large eggs 
– 1 cup sour cream
– 1 teaspoon vanilla extract 
For the Cinnamon Swirl 
– 1/2 cup granulated sugar
– 2 tablespoons ground cinnamon
Preparation 
1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a Bundt pan.
2. Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
3. Cream Butter and Sugars: In a large bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy. Add the eggs one at a time, beating well after each addition.
4. Add Dry Ingredients: Gradually add the dry ingredients to the butter mixture, alternating with the sour cream. Mix until just combined. Stir in the vanilla extract.
5. Prepare Cinnamon Swirl: In a small bowl, mix together the granulated sugar and ground cinnamon.
6. Assemble Cake: Pour half of the batter into the prepared Bundt pan. Sprinkle half of the cinnamon sugar mixture evenly over the batter. Add the remaining batter on top and sprinkle the rest of the cinnamon sugar mixture over the top. Use a knife or skewer to gently swirl the cinnamon sugar into the batter.
7. Bake: Bake in the preheated oven for 50-60 minutes, or until a toothpick inserted into the center comes out clean. 
8. Cool and Serve: Allow the cake to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely. Enjoy your Bundt Coffee Cake with a cup of coffee!
Perfect for a delicious breakfast or a sweet treat!