beat butter with 1/2 (125g) sugar until fluffy
in a separate bowl beat egg yolk ( 1 st a time )with 1/2 (125g) sugar , condensed milk until thick and fluffy
fold in flour, rum,vanilla paste mix till well combined.
Fold egg yolk mixture and( 1) butter mixture togather mix till well combined.
grease and line an 8 inches square tin . Scoop 120 g of cake mixture for 1st layer level it and bake in preheated oven at 180c on upper shelf for 5-7 minutes.
Bring out cake tin layering using 100g of cake mixture from 2nd layer till cake mixture used up .
place a piece of parchment paper on top of baked surface. Use a metal flattener to press all around surface , expelling all air bubbles trapped. Otherwise the cake arches and surface will look pimply.
Tips: check the first few layers to determine the exact time needed as each oven is different. Best Keep overnight before served. Happy baking!