I went up to undue Practice

1. Eggs 4, lemon 2 grain (or white vinegar, 1 TSP), 1/3 cup sugar, butter1/5 of (or corn oil 2 big spoon) 2. Corn flour 2/3 cup, combine all-purpose flour 1/4 cup, add 3/4 TSP baking powder stir. Mix well. As shown in figure

Note: butter must beforehand in containers in microwave oven ding 10 seconds to melt, let cool for later use, remember when ding must not be capped ah, otherwise the consequence is proud, ha, ha, ha, corn flour is that very fine, if feels have particles are not, I went up to undue Practice: 1. In a bowl, add eggs and lemon with high-speed mixer for 5 minutes until invisible to the egg, as shown in the diagram

then on the high-speed mixing the movie and sugar (like more sweet may put 2/3 cups) points and beat until three times in white until thickened and then into butter again dozen 2 minutes. 2. Then mixed good flour points into three times the eggs actually sent sieve, use a rubber knife from up to down gently mix well.