Blend all ingredients of the ice cream in a small food processor a day before if possible and if not, start with making it and freezing immediately.
Preheat oven to 350 F.
Combine all dry ingredients for the cookies: rolled oats, almond flour, sugar, baking powder, coconut, and chocolate.
Combine all wet ingredients for the cookies: coconut oil, tahini, almond milk, and an egg.
Combine wet and dry mixtures.
Spoon about 2 tbsp for each cookie on a baking lined with parchment paper. Bake for 14-15 minutes.
Cool for 5 minutes on the baking sheet and then freeze for at least 30 minutes.
Sandwich a scoop of ice cream in between two cookies. Wrap sandwiches individually and store in freezer to enjoy later.