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A square piece of cinnamon coffee cake with icing over crumble topping on a white plate, with more cake pieces and a white mug in the background.

Cinnamon Crumble Coffee Cake

Prep Time: 20 minutes
Cook Time: 1 hour
Total Time: 1 hour 20 minutes
Servings: 9 squares
Calories: 567kcal
Author: Sydney
Cost: $3.74
This classic cinnamon coffee cake is tender, moist, and filled with a warm cinnamon filling. It’s topped with a buttery, crumbly streusel that adds the perfect sweet crunch to every bite—ideal for pairing with your morning coffee or serving as an easy dessert.
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Ingredients

  • 1 cup Whole Milk
  • 2 teaspoons White Vinegar
  • 2 ½ cups All Purpose Flour
  • 2 tablespoon Cornstarch
  • 1 tablespoon Baking Powder
  • ½ teaspoon Baking Soda
  • 1 teaspoon Cinnamon
  • ½ cup Vegetable Oil
  • ¾ cup Granulated Sugar
  • 1 teaspoon Vanilla Extract
  • ⅔ cup Sour Cream

Cinnamon Filling

  • ⅔ cup Brown Sugar
  • 2 tablespoons All Purpose Flour
  • 1 tablespoon Ground Cinnamon

Crumble Topping

  • ½ cup All Purpose Flour
  • ½ cup Brown Sugar
  • 1¾ teaspoons Ground Cinnamon
  • 6 tablespoons Butter, unsalted cold

Instructions

  • Preheat your oven to 350℉ and grease your 8 inch by 8 inch baking dish. Then start by adding the vinegar to the milk for the batter and let sit while you continue making the other parts of this recipe.
  • Make the cinnamon filling by stirring together all of the ingredients for the cinnamon filling; brown sugar, flour, and cinnamon.
  • Then make crumble topping by stirring together the flour, sugar, and cinnamon for the topping. Once stirred, cut in the cold butter until most of the dry ingredients have mixed with the butter.
  • Finally, make the batter by whisking together the dry ingredients, the flour, cornstarch, baking powder, baking soda, and cinnamon, in a large bowl.
  • Then in another bowl, whisk together the wet ingredients, the vegetable oil, sugar, vanilla, sour cream, and vinegar & milk mixture. Then pour into the bowl with the mixed dry ingredients and combine well with a spoon.
  • Pour a little less than half of the batter into your greased baking dish.
  • Then add the cinnamon filling on top of the batter, evenly.
  • Pour the rest of the batter on top, and then sprinkle the crumble topping on top of the batter, evenly.
  • Bake for about 55-60 minutes, or until a toothpick comes out clean. Let cool slightly before slicing, serving, and enjoying!

Notes

  • Store in an airtight container at room temperature for 2-3 days.
  • If you have buttermilk, go ahead and use instead of the milk and vinegar.
  • For efficiency measure out the ingredients before you start mixing the recipe.

Nutrition

Serving: 1square | Calories: 567kcal | Carbohydrates: 83g | Protein: 6g | Fat: 24g | Trans Fat: 0.4g | Cholesterol: 33mg | Sodium: 287mg | Fiber: 2g | Sugar: 46g
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