Buttermilk Cake with Blood Orange Frosting As seen on Sarah Kieffer Bookmark recipe Print recipe Download recipe Share Rating 0 out of 5 stars (0) Ingredients 3 cups all-purpose flour1 tablespoon baking powder1 teaspoon salt1 cup (two sticks) unsalted butter at room temperature2 cups sugar4 large eggs, room temperature2 teaspoons vanilla extract1/2 cup buttermilk1/2 cup sour cream2 cups (4 sticks) unsalted butter, room temperaturezest of one blood orange1/4 cup blood orange juice2 teaspoons vanilla2 tablespoons Triple Sec (optional)1/8-1/4 teaspoon salt4 cups powdered sugar Calories How would you rate this recipe? 1 stars 2 stars 3 stars 4 stars 5 stars Preparation Inline ingredients (beta) Cook mode Click to complete Step 1 Preheat the oven to 350°F. Butter three 8-inch round cake pans and line the bottoms with parchment paper. Butter and flour the pans. Step 2 In a small bowl, whisk together the flour, baking powder, and salt. Set aside. Step 3 Mix the buttermilk and sour cream in a small measuring cup and set aside. Step 4 In the bowl of a standing mixer, whip the butter with a whisk attachment at medium speed until light and fluffy. Step 5 Add the sugar to the butter and beat again until light and fluffy, about 3 minutes. Step 6 Add eggs one at a time, scraping down the sides as needed. Step 7 Add the vanilla and whisk the batter again at medium speed for 4-5 minutes, until the batter is light and voluminous. Step 8 Using a spatula, fold in the flour and the buttermilk-sour cream mixture in three additions, beginning and ending with the flour. Step 9 Divide batter evenly among the prepared cake pans and bake for 25-30 minutes or until set in the center and a cake tester comes out with just the slightest bit of crumb. Step 10 For the frosting, in the bowl of a standing mixer, beat the butter until creamy. Step 11 Scrape down the sides and add the orange zest, juice, vanilla, Triple Sec (if using), and salt. Mix on low until combined, then beat the ingredients together for a minute. Step 12 Turn the mixer back to low, slowly add the powdered sugar, mixing until combined. Step 13 Increase the speed to medium-high and beat for 6-8 minutes until light and fluffy. Chef’s notes Start with 1/8 teaspoon salt in the frosting and add more if it's too sweet.The cake can be made in two layers, although three are recommended for a less dense result.