Add 100 g dulce de leche - cook dulce de leche first to thicken
1 tsp vanilla extract, mix
Add the beaten egg yolks, mix
Instructions
In a pot
cook dulce de leche until thick, cool completely
In a stand mixer
5 egg whites
2 tsp vinegar, lemon or calamansi
Whisk until bubbles
Add 40g granulated white sugar
Beat until stiff peak
Scoop a dollop of egg white mixture to the egg yolk mixture and whisk
Pour over the mixture onto the remaining egg white mixture and fold until combined
Baking
Transfer onto 12x 8 inches baking pan lined with parchment paper
Bake at preheated oven at 160C or 320F for 30 - 5o mins
Pour water on a tray and place it under the tray with the cake mixture
Loosen the edges and turn the cake upside down to cool
Frosting
300g softened butter
Cream butter until pale in color
Add 300g dulce de leche and cream until silky smooth consistency. Do the spoon test to try the frosting. When spoon is shaken it should be stiff enough not to fall
You can add a tbsp of milk at a time
Decorating
Cut the cake in half and spread 50g of dulce de leche evenly