Preparation Put sugar in Thermomix. Process 20 seconds at speed 10. Reserve 50 g that you mix with corn starch. Place butterfly in Thermomix. Add egg whites to bowl. Process for 5 minutes at 90C, speed 4. Meanwhile, soak gelatin in cold water. Squeeze out water. Add gelatin to Thermomix. Process for 4 min at speed 4. Pour into oiled pan. Spread. Let set. Sprinkle with sugar/corn starch mixture. Remove from pan. Spread sugar/corn starch mixture all over. Cut into pieces, spread ing coating mixutre.