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+ servings
Slice of baked coffee cake with strawberry on plate.
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5 from 2 votes

Cinnamon Walnut Coffee Cake

Warm, buttery, Cinnamon Walnut Cake uses a tender sour cream batter and a cinnamon-walnut streusel, for a bakery-style cake at home. Perfect for breakfast or brunch!
Prep Time15 minutes
Cook Time40 minutes
Total Time55 minutes
Course: Breakfast
Cuisine: American
Servings: 16 slices
Calories: 313kcal

Ingredients

Cake:

  • ½ cup milk (dairy or plant based is fine)
  • ½ cup sour cream or plain greek yogurt 115g
  • 1 egg
  • ¼ cup vegetable oil 56g
  • 1 teaspoon vanilla 4g
  • ¾ cup granulated white sugar 155g
  • ½ teaspoon salt
  • cups all-purpose flour 202g
  • 2 teaspoons baking powder

Crumble topping:

  • 1 cup rolled oats
  • ½ cup brown sugar 107g
  • 2 Tablespoons flour
  • 2 teaspoons cinnamon
  • 4 Tablespoons melted butter (½ stick) 56g
  • ½ cup chopped walnuts

Instructions

  • Preheat oven to 350 F. Lightly grease a 9X9 inch pan or line with parchment paper.
  • In medium sized mixing bowl whisk together ½ cup milk , ½ cup sour cream or plain greek yogurt, 1 egg, ¼ cup vegetable oil, 1 teaspoon vanilla, ¾ cup granulated white sugar, and ½ teaspoon salt. Mix well.
  • Add1½ cups all-purpose flour and 2 teaspoons baking powder, mix together until fully combined and no flour pockets are left but do not overmix.
  • Place batter in prepared 9X9 inch pan. 

For the oat crumble topping:

  • In a small bowl combine 1 cup rolled oats,½ cup brown sugar,2 Tablespoons flour,2 teaspoons cinnamon, 4 Tablespoons melted butter , ½ cup chopped walnuts and mix well, then spread over cake batter evenly to cover.
  • Bake at 350 F for 40-45 minutes (glass or heavy ceramic pans may take a few minutes longer), until inserted toothpick comes out clean.

Notes

Can be doubled in a 9x13 inch pan. Simply increase baking time to 50-60 minutes or until an inserted toothpick comes out clean. 
To make overnight: 
  1. Make recipe as directed.
  2. Place in refrigerator overnight, and when ready to bake increase baking time by 5-10 minutes. Make sure to never place a glass pan in a very hot oven or it could shatter. Put it in as the oven is preheating. 
  3. Insert toothpick every 5 minutes after 40 minutes to check doneness. 
Recipe adapted from an old edition of  Better Homes and Gardens cookbook. 

Nutrition

Calories: 313kcal