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Moist Apple Coffee Cake with Brown Sugar Cinnamon Streusel

A round apple coffee cake with a thick cinnamon crumb topping, sliced open to show the moist cake and apple filling.

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Make this easy, tender Apple Coffee Cake featuring juicy apple chunks and a rich brown sugar cinnamon streusel topping. It is perfect for breakfast, brunch, or a cozy dessert.

Ingredients

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  • 1 3/4 cups all-purpose flour
  • 1 1/2 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 teaspoon ground cinnamon (for cake batter)
  • 1 cup granulated sugar
  • 1/2 cup unsalted butter, softened
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1/2 cup sour cream or plain yogurt
  • 2 medium apples, peeled, cored, and diced
  • 1 cup all-purpose flour (for streusel)
  • 1/2 cup packed light brown sugar (for streusel)
  • 1/4 cup granulated sugar (for streusel)
  • 1 teaspoon ground cinnamon (for streusel)
  • 1/2 cup cold unsalted butter, cut into small pieces (for streusel)

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and flour a 9-inch square baking pan or a 9-inch round cake pan.
  2. In a medium bowl, whisk together the 1 3/4 cups flour, baking powder, baking soda, 1/2 teaspoon salt, and 1 teaspoon cinnamon. Set aside.
  3. In a large bowl, cream together the 1 cup granulated sugar and 1/2 cup softened butter until light and fluffy. Beat in the eggs one at a time, then mix in the vanilla extract.
  4. Alternate adding the dry ingredients mixture and the sour cream to the wet ingredients, beginning and ending with the dry ingredients. Mix until just combined. Do not overmix.
  5. Gently fold the diced apples into the batter. Spread the batter evenly into the prepared pan.
  6. Prepare the streusel: In a separate bowl, combine the 1 cup flour, brown sugar, 1/4 cup granulated sugar, and 1 teaspoon cinnamon for the topping.
  7. Cut in the 1/2 cup cold butter using a pastry blender or your fingers until the mixture resembles coarse crumbs.
  8. Sprinkle the streusel topping evenly over the cake batter.
  9. Bake for 45 to 55 minutes, or until a wooden pick inserted into the center comes out clean.
  10. Let the cake cool in the pan on a wire rack for at least 20 minutes before slicing and serving warm.

Notes

  • For extra moisture, use Greek yogurt instead of sour cream in the batter.
  • If you prefer a thinner topping, reduce the streusel ingredients by one-third.
  • This cake pairs well with coffee or tea, making it a great option for meal planning breakfast rotation.

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