In a large bowl, cream together the softened butter and sugar until light and fluffy.
Add the eggs vanilla and dulce de leche. Mix all ingredients together until creamy.then pour in the milk
In a separate bowl, combine the dry ingredients: flour, baking powder and salt.
Add the flour into the batter in small amounts and whisk after each addition. Whisk only until flour is incorporated.
Bake in preheated oven for 35 to 40 minutes, or until a toothpick inserted into the center comes out clean. Remove cake from pans and allow them to cool completely.