how to make multilayered butter cake (lapis legit)

Ingredients:

    570cc or 30 egg yolks
    525-600 g butter, whipped or melted
    100 g flour, sifted
    300 g granulated sugar
    3 Tbs. sweetened condensed milk
    1 Tbs. special layer cake extract (optional)
    15 g powdered milk
    ½ tps. powdered vanilla extract

Instructions:

    Place the egg yolks, granulated sugar and vanilla into mixing bowl. Beat to very high soft peak.
    Stir in the layer cake extract, flour and butter. The batter should be very thick.
    Place wax paper at the bottom of a 8x8x8 inch buttered baking pan. Spread butter on top of the wax paper as well.
    Pour 3-4 Tbs. of batter into the wax covered pan and bake in a preheated 350°F oven (gas oven is better than electric oven) for 5 minutes.
    Remove from oven and press the cake evenly and then spread butter (not to much, just for flavoring) on cake top. Pour another 3-4 Tbs. of batter and bake it again for five minutes. Keep doing this step until the batter is finished.
    Serve when cool.

Makes 30 slices.