To prepare a timbales recipe, first you need to prepare the filling. First, you'll need the following ingredients: 12 cup (240 ml) butter, 2 tablespoons (120 g) sour cream, 1 teaspoon salt, and 1/4 teaspoon pepper to taste. Heat the butter over medium-high heat until it's melted. Add the flour and stir until the mixture resembles coarse crumbs. Gradually add the milk, stirring constantly until no more lumps are left. Continue to stir the batter until all the ingredients are well combined. The batter should be thick and sticky, but not runny. If you don't like the texture of your batter, add more milk. Once you have added enough milk to coat the bottom of the pan, turn the heat down to medium and cook the pancakes until they're golden brown, about 8 to 10 minutes. Remove from heat and serve.