Gluten Free Peanut Butter “Twix” Cookies
Ingredients
Shortbread Cookies
1 1/2 cups (210 g) all purpose gluten free flour (I used Better Batter)
3/4 teaspoon xanthan gum (omit if your blend already contains it)
1/4 cup (36 g) cornstarch (or try arrowroot)
1/8 teaspoon kosher salt
1/2 cup (100 g) granulated sugar
8 tablespoons (112 g) unsalted butter, at room temperature
1 to 2 tablespoons lukewarm water
Peanut Butter Filling
4 tablespoons (56 g) unsalted butter, chopped
3/4 cup (192 g) smooth no stir peanut butter
1/2 teaspoon pure vanilla extract
1/4 teaspoon kosher salt
1 cup (115 g) confectioners’ sugar
Milk or cream, for thinning as necessary
Chocolate Topping
6 ounces milk or semi-sweet chocolate, chopped
1 tablespoon (14 g) virgin coconut oil
Instructions
Prepare the cookies. Preheat your oven to 325°F. Line rimmed baking sheets with unbleached parchment paper and set them aside.
In a large bowl, place the flour, xanthan gum, cornstarch, salt and sugar, and whisk to combine well. Create a well in the center of the dry ingredients, add the butter and 1 tablespoon of the water, and knead until the dough comes together, using more water by the teaspoon if necessary. Place the dough between two sheets of unbleached parchment paper and roll into a rectangle about 1/2 inch thick. Cut out rounds about 2-inches in diameter from the dough, and place 1 inch apart from one another on the prepared baking sheets. Gather and reroll scraps. Place the baking sheets in the center of the preheated oven and bake for about 12 minutes, or until just beginning to brown on the edges. Remove from the oven and allow to cool completely on the baking sheets.
Prepare the filling. In a medium-size, heat-safe bowl, place the butter and peanut butter and heat in the microwave in 30-second bursts on high power, stirring in between, until melted and smooth. (Alternatively, you can melt the mixture in a small saucepan over low heat.) Add the vanilla, salt and the confectioners’ sugar, mixing to combine after each addition. The filling will be thick. Add milk or cream by the tablespoon, mixing to combine, as necessary to make the filling very thickly pourable. Transfer the filling to a pastry bag fitted with a 1/4-inch open plain piping tip (or just a pastry bag with a similar opening, no tip).
Fill the cookies. Holding the piping tip very close to the top of each cooled cookie, pipe a very flat swirl of filling on top. Smooth the filling into an even layer with a moistened offset spatula. Allow the filling to sit until set (it will be firm to the touch; it only takes a few minutes, so work quickly!).
Prepare the topping and finish the cookies: Place the chocolate and coconut oil in a small, microwave-safe bowl and melt in 45 second bursts at 60% power, stirring in between, until melted and smooth. Allow the chocolate to sit at room temperature until it begins to thicken a bit. Spoon about 1 1/2 tablespoons of topping on each cookie. Allow the topping to set at room temperature.
Cookies and topping adapted from the recipe for gluten free “Twix” candies (reprinted here) in the book Gluten-Free Classic Snacks. Peanut butter filling from page 110.