Make sure the jar is clean and completely dry. Layer the ingredients in the following order for visual appeal: whole wheat flour, rolled oats, peanut butter powder, milk powder, and ground flaxseed. Seal the jar.

Attach the tag and chosen cookie cutter to the neck of the jar using a piece of twine or ribbon, tying it securely with a bow.

Preheat oven to 350°F. In a bowl, mix jar contents with 2 eggs, ¾ cup warm water, and 2 tbsp oil to form a dough. Roll dough ½-inch thick and cut into shapes. Place on a parchment lined baking sheet and bake 30-35 minutes until firm. For extra crunch, cool in the turned off oven. Store airtight for up to 2 weeks.