1. In a stand mixer cream the butter, sugar, and shortening until fluffy. 2. Add egg (at room temperature) and beat until mixture is smooth and creamy. Stir in the vanilla. 3. Sift together the flour, cream of tartar, salt, and baking soda. Add to butter and sugar mixture, and mix on low speed until the flour is just incorporated. 4. Add the ground nuts and mix 20 seconds more. 5. Roll the dough into two cylinders, about 1.5 inches in diameter. Wrap well with saran wrap and chill until firm. 6. Preheat the oven to 350 degrees. Slice off 1/8" -1/4" inch thick rounds of dough, and place on a cookie sheet. Brush cookies slightly with water (using damp pastry brush), and sprinkle tops of cookies with sugar. 7. Bake for 8-10 minutes, watching closely, until cookies start to brown slightly. Remove from oven and cool cookies completely on a rack. 8. Spread dulce de leche on a the bottom of a cookie and sandwich another cookie to the first, with the sugared sides of the cookies facing out. ---------------------------------------------------------------------------
Nutrition
Ingredients
