Base: Eggs sugar and 1 tbsp hot water is broken 7-8 minutes. Flour, starch, cocoa and baking powder, mix and add to the egg mixture. Stir until a homogeneous mixture, pour into a baking dish (covered with baking paper) and smoothed. Bake in preheated 200 ° C oven until ready (check with a stick). Finished base turns on a kitchen towel and allow to cool completely. Then removed, and the base paper is cut into two equal parts. Cream: Soak gelatin in cold water. Starch was dissolved in a little milk. The remaining milk and sugar are heated. Under continuous stirring, add the starch and remove from heat. Gelatin is drained from the water and added to the milk. Stir to melt the gelatin, and allowed to cool completely. Yogurt, honey, lemon zest and lemon juice mix. Yogurt is added to the milk, mix well and put in refrigerator (thickening and gelling slightly). The cream is stirred in the snow and is mixed with the milk mixture. Put it in a refrigerator, a slight tightening cream. In a baking dish placed first base. On it and pour the cream is smoothed. Place the second base and press down gently. Cake freeze for 1-2 hours. Then carefully remove the cake ring shape. Optional cake pour chocolate icing and decorated with marzipan Cow. Cake refrigerate and serve cold.