First, spoon the ice cream into a 9 X 13 inch baking pan lined with wax paper. Smooth it out with an uneven spatula and place the pan in the freezer to set for at least 4 hours with saran wrap over top. *see below notes on ice cream layer options*
1.5 quarts of your favorite ice cream
Preheat oven to 350 F. In a large mixing bowl or the bowl or in a stand mixer, beat the eggs and coconut sugar together until creamy. Add the vanilla and coconut oil to the bowl and continue to beat until well incorporated.
2 eggs, 1 cup coconut sugar, 1 teaspoon vanilla, ½ cup coconut oil
Add the King Arthur Gluten-free Measure for Measure Flour, cacao powder, and baking soda to the bowl and mix on low speed until a large ball of dough forms. This can also be done with a rubber spatula.
2 ½ cups King Arthur Gluten-free Measure for Measure Flour, 1 cup cacao powder, 1 teaspoon baking soda
Lightly dust a working surface with a little extra flour and roll out ½ of the dough into a 12 X 9 inch rectangle. Slice 3 X 3 inch squares out of the dough. There should be room to cut 4 columns and 3 rows. Transfer the squares to a baking sheet and poke a few holes into each of the squares with a toothpick to resemble the traditional ice cream sandwich cookie. Bake in the oven for 7 - 9 minutes until the cookies have risen slightly and the corners are rounded. Repeat with the remaining ½ of the dough. Let cool before assembling.
When ready to assemble, slice the pan of ice cream into 12 3 X 3 inch squares, similar to the cookie dough, with a sharp knife. Place a square of the ice cream on the bottom of one of the cooled cookies followed by another cookie on top. Press down slightly to "lock" the ice cream in place and enjoy!