What's your best recipe for chocolate cake? I'm making one for my sister's birthday.?

Chocolate Cake with decadent chocolate frosting that will quickly become your favorite! Here is the Recipe:-
Ingredients

Chocolate Cake
2 cups all-purpose flour
2 cups sugar
¾ cup unsweetened cocoa powder
2 teaspoons baking powder
1½ teaspoons baking soda
1 teaspoon salt
1 teaspoon espresso powder
1 cup milk
½ cup vegetable oil
2 eggs
2 teaspoons vanilla extract
1 cup boiling water
Chocolate Buttercream Frosting Recipe

Instructions
Preheat oven to 350º F. Prepare two 9-inch cake pans by spraying with baking spray or buttering and lightly flouring.
For the cake: Add flour, sugar, cocoa, baking powder, baking soda, salt and espresso powder to a large bowl or the bowl of a stand mixer. Whisk through to combine or, using your paddle attachment, stir through flour mixture until combined well.
Add milk, vegetable oil, eggs, and vanilla to flour mixture and mix together on medium speed until well combined. Reduce speed and carefully add boiling water to the cake batter. Beat on high speed for about 1 minute to add air to the batter.
Distribute cake batter evenly between the two prepared cake pans. Bake for 30-35 minutes, until a toothpick or cake tester inserted in the center comes out clean.
Remove from the oven and allow to cool for about 10 minutes, remove from the pan and cool completely.

best german chocolate;his rich, authentic cake is dense with chocolate, coconut, and nuts. 1/2 cup water

4 (1 ounce) squares German sweet chocolate

1 cup butter, softened

2 cups white sugar

4 egg yolks

1 teaspoon vanilla extract

1 cup buttermilk

2 1/2 cups cake flour

1 teaspoon baking soda

1/2 teaspoon salt

4 egg whites

1 cup white sugar

1 cup evaporated milk

1/2 cup butter

3 egg yolks, beaten

1 1/3 cups flaked coconut

1 cup chopped pecans

1 teaspoon vanilla extract



1/2 teaspoon shortening

1 (1 ounce) square semisweet chocolate
Directions

Preheat oven to 350 degrees F (175 degrees C). Grease and flour 3 - 9 inch round pans. Sift together the flour, baking soda and salt. Set aside. In a small saucepan, heat water and 4 ounces chocolate until melted. Remove from heat and allow to cool.
In a large bowl, cream 1 cup butter and 2 cups sugar until light and fluffy. Beat in 4 egg yolks one at a time. Blend in the melted chocolate mixture and vanilla. Beat in the flour mixture alternately with the buttermilk, mixing just until incorporated.
In a large glass or metal mixing bowl, beat egg whites until stiff peaks form. Fold 1/3 of the whites into the batter, then quickly fold in remaining whites until no streaks remain.
Pour into 3 - 9 inch pans Bake in the preheated oven for 30 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool for 10 minutes in the pan, then turn out onto wire rack.
To make the Filling: In a saucepan combine 1 cup sugar, evaporated milk, 1/2 cup butter, and 3 egg yolks. Cook over low heat, stirring constantly until thickened. Remove from heat. Stir in coconut, pecans and vanilla. Cool until thick enough to spread.
Spread filling between layers and on top of cake. In a small saucepan, melt shortening and 1 ounce of chocolate. Stir until smooth and drizzle down the sides of the cake.

Very close to the previous recipe, except I use sour cream or buttermilk instead of milk, half brown sugar/half white, and dissolve the espresso powder in the boiling water.