Make ahead: First, prepare a baking pan. Grease it with ½ Tablespoon solid fat and dust with 1 ½ Tablespoons flour od breadcrumbs. Preheat the oven to 350 °F.
Put 2 cups kefir and ½ cup sunflower oil in a mixing bowl. Add 1 medium egg, 1 ¼ cups granulated sugar, 3 Tablespoons dutch cocoa powder, and 2 cups all-purpose flour mixed with 1 teaspoon baking soda.
Using a hand mixer, blend everything until you achieve a smooth, semi-liquid batter.
Pour the batter onto the prepared baking pan, smoothing the surface with a spatula.
The exact baking time depends on the size of the baking pan you use. If the pan is smaller and the batter layer is thicker, it may need to bake a little longer. Place the pan in a preheated oven and bake for 30 minutes. Toward the end of the baking time, insert a wooden skewer into the cake. If it comes out dry, the cake is done. If not, bake for another 3-5 minutes and repeat the skewer test for doneness.
Let the kefir cake cool completely.
Prepare chocolate glaze: Melt 1 cup chocolate chips over a water bath. Add ⅓ cup heavy cream and stir until you have a smooth, combined chocolate glaze.
Pour the chocolate glaze over the cooled cake and spread it evenly over the entire surface. Let it sit for a while, then sprinkle the top with 3 Tablespoons schredded coconut.
Notes
SERVING: Cut the kefir cake into 3x3 inch slices (known as "řezy" in Czech) and serve on a dessert plate.
I baked this cake on a 9x13 inches (23x33 cm) baking pan.
Use baking soda in the batter instead of baking powder. Baking soda doesn't leave the aftertaste that baking powder sometimes does. However, be sure to put the cake in the oven immediately to ensure it turns out nice and fluffy.