Hi Susi :-) I found this recipe on the internet but have not tried it. I hope it is what you are looking for.

Chocolate Macaroon Bundt Cake

2 cups sifted all-purpose flour
1 3/4 cups white sugar
1/2 cup unsweetened cocoa powder
1 teaspoon salt
1 teaspoon baking soda
2 teaspoons vanilla extract
1/4 cup water
1/2 cup shortening
1/2 cup sour cream
4 egg yolks
3 egg whites
1 egg white
1/4 cup white sugar
1 cup flaked coconut
1 tablespoon all-purpose flour
1 teaspoon vanilla extract

Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 10 inch Bundt pan.
Make the filling. Beat 1 egg white in a small bowl until peaks form. Gradually beat in 1/4 cup sugar Beat until stiff peaks form. Fold in coconut, 1 tablespoon flour and 1 teaspoon vanilla. Set aside.
In a large bowl, mix together 2 cups flour, 1 3/4 cup sugar, cocoa, salt and soda. Add 2 teaspoons vanilla, water, shortening, sour cream egg yolks and 3 egg whites. Blend at low speed until moistened, then beat at medium speed for 3 minutes.
Pour cake batter into a 10 inch Bundt pan. Drop the filling by teaspoons around the top of the batter, avoiding the edges.
Bake at 350 degrees F (175 degrees C) for 55 to 60 minutes, or until a toothpick inserted into the center of the cake comes out clean. Let it cool in the pan for 10 minutes , then turn out onto a wire rack to continue cooling.
Top with Chocolate Glaze.

Chocolate Glaze
2 cups sifted confectioners sugar
2 tablespoons unsweetened cocoa powder
1 tablespoon butter or margarine, softened
1/2 teaspoon vanilla extract
2 to 4 tablespoons milk

In a small bowl, combine butter with sugar and cocoa.
Add vanilla. Add milk gradually until smooth.
Drizzle over cake.
Makes enough glaze for 1 Bundt cake.