Sour Cream Coffee Cake (with Crumb Topping)

Blossom Lady
Dec 27, 2022 09:27 AM
Sour Cream Coffee Cake (with Crumb Topping)

Simple and classic, this buttery cinnamon crumb coffee cake is anything but plain! Sour cream ensures a moist, light (not overly dense) breakfast cake, and there’s double the brown sugar cinnamon crumb streusel. Enjoy a thick ribbon of streusel inside and plenty of crumbs on top, both made from the same mixture.

Cinnamon Crumb Mixture

  • 2/3 cup (135g) packed dark or light brown sugar
  • 3/4 cup (95g) all-purpose flour (spoon & leveled)
  • 2 and 1/2 teaspoons ground cinnamon
  • 6 Tablespoons (85g) unsalted butter, cold and cubed
  • 1 and 1/3 cups (166g) all-purpose flour (spoon & leveled)
  • 1 teaspoon baking powder
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup (115g) unsalted butter, softened to room temperature
  • 3/4 cup (150g) granulated sugar
  • 2 large eggs, at room temperature
  • 2 teaspoons pure vanilla extract
  • 1/2 cup (120g) full-fat sour cream, at room temperature*
  • 2 Tablespoons (30ml) milk (any kind, dairy or nondairy, is fine)
  • 1 cup (120g) confectioners’ sugar, sifted
  • 1/2 teaspoon pure vanilla extract
  • 2 Tablespoons (30ml) heavy cream or milk
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