Melting Moments Shortbread Biscuits

1 . Stage

Preheat oven to 350°F (180°C) and line 2 sheet pans with parchment paper or silicone mats.

2 . Stage

In a food processor (or in a large bowl, using an electric mixer on medium speed), pulse butter and sugar until light and creamy. Add flour, custard, vanilla, and any additional flavorings, then continue to pulse until dough is texture of coarse bread crumbs.

3 . Stage

Transfer dough to a bowl, then roll dough between palms of your hands into balls the size of a walnut. Gently press between your palms to flatten and arrange on prepared sheets. Press surface of dough with a cookie stamp or tines of a fork.

4 . Stage

Bake until lightly golden, 10 to 12 minutes. Let cool slightly, then transfer biscuits to wire racks and let cool completely.

5 . Stage

In food processor (or in a medium bowl, using electric mixer on high speed), pulse butter until lightened and smooth, about 1 minute. Add sugar, vanilla, and any additional flavorings and process until very light and creamy, about 5 minutes.

6 . Stage

On a work surface, turn half of cooled biscuits flat side up. Using an offset spatula or spoon, spread a generous amount of buttercream onto each overturned biscuit. Place a second biscuit, flat side down, on top of buttercream, pressing gently to adhere.

7 . Stage

Lightly dust tops with sugar.