To prepare a tiropita, you'll first need to prepare the filling. To do this, first gather your ingredients. First, gather the flour, baking powder, sugar, and salt. Then, mix the ingredients together until they're well combined. Next, add the egg yolks and beat them together. Finally, pour the mixture into the pastry shell and bake it in the oven for 20 to 25 minutes, or until it's golden brown.