Orange Butter Cake with Chocolate 'Sour Cream' Yogurt Ganache

Adapted from the Joy of Baking's Yellow Butter Cake

Ingredients
3 1/2 t. baking powder
1 c. raw sugar
6 large egg yolks
1 c. whole milk
1 c. chopped Trader Joe's 72% Pound Plus Dark Chocolate
2 t. vanilla extract
orange extract, to taste
3 c. AP flour
1/2 t. salt
3/8 c. unsalted butter, room temperature
1 3/8 c. 2% Greek yogurt, divided
1-2 T. whole milk
Vanilla extract, orange extract, instant espresso, cayenne, cinnamon, to taste (to increase the complexity of the chocolate)

Directions
Cake
In a bowl, sift or whisk the flour with the baking powder, and salt.

In the bowl of your electric mixer, or with a hand mixer, beat the butter until soft and creamy (about 1-2 minutes). Gradually add the sugar and beat until light and fluffy (about 3-5 minutes). Add beaten egg yolks and yogurt, in two batches, beating well after each addition. Scrape down the sides of the bowl as needed. Add the vanilla and orange extracts and beat until combined.

With the mixer on low speed, alternately add the flour mixture (in three additions), and milk (in two additions), beginning and ending with the flour.  

Evenly divide the batter between the prepared pans, smoothing the tops with an offset spatula or back of a spoon. Bake 22 to 28 minutes or until a toothpick inserted into the center of the cake just comes out clean and the cake springs back when pressed lightly in center.  

Place the cakes on a wire rack to cool, in their pans, for about 10 minutes. Then invert the cakes onto a greased rack. To prevent cracks, re-invert cakes so that tops are right side up. Cool completely before frosting.

Ganache 

Put the chopped chocolate, the chocolate 'amplifiers', and a few tablespoons of whole milk in a microwave safe dish.  Microwave on high for 15-30 second intervals, stirring each time.  Whisk in the remaining 1 c. of yogurt.  Let cool to room temperature.

Assemble: Place one cake layer on your serving plate and spread with about 3/4 cup (180 ml) of frosting. Place the other cake layer on top of the frosting and cover the entire cake with the remaining frosting. 

Makes one - 9 inch (23 cm) layer cake.

Nutrition Facts

Servings 12.0
Amount Per Serving
calories 289
% Daily Value *
Total Fat 10 g	15 %
Saturated Fat 5 g	27 %
Monounsaturated Fat 3 g
Polyunsaturated Fat 1 g
Trans Fat 0 g
Cholesterol 111 mg	37 %
Sodium 125 mg	5 %
Potassium 187 mg	5 %
Total Carbohydrate 43 g	14 %
Dietary Fiber 1 g	4 %
Sugars 19 g
Protein 9 g	18 %
Vitamin A	7 %
Vitamin C	0 %
Calcium	13 %
Iron	5 %