Make 1 8" cake
Chiffron Cake:
6 Large egg
1/4 tsp cream of tartar
1 cup Sugar (minus 1 Tbsp if prefer less sweet)
1 cup cake flour (can be substitue with (1cup-2tsp) flour + 2tsp corn starch)
6 Tbsp butter, melted
6 Tbsp milk
1/2 tsp baking powder
2 tsp green tea powder
pinch of salt
Optional 1 tsp vanilla extract (add only for basic chiffron cake where green tea powder is not used)
Green Tea Mousse
3 cup heavy cream
1 pack gelatin + ~2-3 Tbsp water
4 Tbsp Sugar (or a little more to taste)
3-4tsp green tea powder
Method:
1. Preheat oven to 350F. Line parchment paper on clean 8" round baking pan. (Do not grease sides of pan). Sift all dry ingredients: flour, green tea powder, baking powder and salt.
2. Melt butter and milk together in microwave (~30 sec). Stir until everything is dissolved and then cool to room temperature.
3. Separate egg whites and yolks in two mixing bowls
4. Beat egg yolks with 1/2 of sugar until thick and pale yellow
5. Add milk butter mixture to egg yolks and mix until blend. (beware that butter mixture has to be cool enough)
6. Beat egg whites, sugar and cream of tartar until soft peak
7. Gently fold in egg yolk mixture (small amount at a time)
8. Gently fold in sifted dry ingredients in batches
9. Pour into clean baking pan lined with parchment paper on the bottom.
10. Bake for ~30min until a toothpick come out clean when insert in the center of cake.
11. Invert the cake to cool for 15 min to maximize height of cake.
12. Unmold cake and let it cool completely.
13. Slice cake into 3 layers. Trim the cake layers so that it's 1/2" smaller than the cake pan with removable bottom.
14. Whipped heavy cream, sugar and green tea powder until soft peak. Adjust amount of green tea powder and sugar to taste (beware green tea powder can go overboard easily). Melt gelatin in warm water and mix into the mousse and continue to whip until stiff peak.
15. Place a cake layer, spread 1/3 of mousse evenly, repeat for remaining layers. Smooth out the top layer. Refrigerate until firm (3-4 hours)
16. To unmold, use a hair dryer to heat up the sides of the pan slightly and push from bottom the remove the cake carefully.
17. Sprinkle green tea powder on the top for decorations.
