Eggs
It’s not custard without eggs, after all! They’ll bring rich flavor and bind the filling’s ingredients together.
For extra richness, I add an extra egg yolk to the recipe.
Buttermilk
Many recipes call for evaporated milk, which adds even more sweetness to the mix.
But I recommend using buttermilk because that added tang helps balance all the sugar in the mix.
If you don’t have buttermilk on hand, simply mix a tablespoon of vinegar or lemon juice with a cup of milk and let it sit for 5 minutes (or until it curdles).
