In a medium bowl, melt the butter in the microwave to soften (about 15 seconds).
Add in milk, powdered sugar, and vanilla and mix until a dough ball forms.
Place bowl in freezer for 10-15 minutes.
Place dough ball on a large piece of parchment paper or granite countertop, then roll it out in a rectangular shape using a rolling pin. (Powder your rolling pin with additional confectioner’s sugar to prevent dough from sticking)
Top the rolled out dough with cookie butter (about 1/4 in. thick).
Begin to roll, starting with one edge. (Lift one side of the parchment paper to begin rolling. Place into the refrigerator immediately to keep shape.
Remove after 1-2 hours and slice into pieces 1/2 inch thick using a sharp knife or pizza cutter.
Notes
What should I do if the "dough" is flimsy/floppy?
-Add more confectioner's sugar and make sure it's been placed in the freezer prior to rolling.
VARIATIONS
You can make this recipe with peanut butter, sun butter, and cashew butter. I like to stick with the creamier-types of jarred butter.