To fill: spread the dulce de leche on top of cake and place the second cake on top (if cakes are domed, level with knife before filling). (cookingwithbooks.net)
Next time you make the cookies, be sure you're stirring the flour, scooping into measuring cup, and leveling with a knife so you aren't putting too much flour into the recipe. (thereislifeafterwheat.com)
17 ounces all purpose flour (3 2/3 cups minus 2 tablespoons)(lightly spooned into the measuring cup and swept level with a knife — kitchen scales are best!) (bakingandboys.com)