Add the diced apples, butter, brown sugar, granulated white sugar, vanilla and spices to a small saucepan. Heat over medium heat, stirring occasionally, until the apples are tender, about 15-18 minutes. Then let the apple filling cool completely.
2 ½ cups (350 g) apples peeled and diced into ½ inch pieces, 2 tablespoon (28 g) unsalted butter, ¼ cup (55 g) brown sugar, packed, 2 tablespoon (25 g) granulated white sugar, 1 teaspoon vanilla, 1 teaspoon ground cinnamon, ¼ teaspoon ground nutmeg, ¼ teaspoon ground allspice, ¼ teaspoon ground ginger, ⅛ teaspoon ground cloves