Preheat your oven to 350°F.
In a large mixing bowl, combine the coconut oil, peanut butter, applesauce, granulated sugar, and brown sugar. Mix until well combined.
Add the salt, baking powder, baking soda, and vanilla. Stir to incorporate.
Add the gluten-free oats and almond flour, mixing until everything is combined.
Fold in your mix-ins. Aim for approximately 3–4 cups total, depending on what you're using.
Scoop the dough onto a baking sheet. These cookies won't spread much, so flatten them slightly before baking.
Bake at 350°F for 8–10 minutes.
Remove from the oven and allow to cool. If you didn't flatten the cookies before baking, you can gently tap the baking sheet on the counter immediately after removing it from the oven to help them settle.