Heat oven to 350 degrees F (176 C) and line a baking sheet with parchment paper.
In a large mixing bowl, stir together almond flour, oats, gluten-free flour, raisins, baking powder, cinnamon, salt, and brown sugar.
In a separate bowl, beat aquafaba (using a handheld mixer or by whisking vigorously, which will take much longer) until light and fluffy and loose peaks have formed. (Add 1/8 tsp cream of tartar to help them along if not whipping.)
To the aquafaba, add the almond butter and oil and beat or whisk to combine. (The mixture will deflate a little — that's okay). Then add to dry ingredients and mix until combined. You should have a firm, semi-tacky dough (see photo). If not baking immediately, cover and chill in the refrigerator for up to 2-3 days (the cookies will develop a bit more flavor and slightly firmer texture if the dough chills, but chilling this long is not necessary).
Scoop dough into roughly 2-Tablespoon amounts (I like this scoop) and place on prepared baking sheet with about a 1-inch gap in between each cookie to allow for spreading. Press down slightly with your palm to form a disc. Then use fingers to tuck in any raisins that might be sticking out. There should be about 12 cookies.
Bake for 12-14 minutes, or until the edges are slightly golden brown and they’ve puffed up and expanded a bit. Remove from oven and let cool for 5 minutes on the pan before enjoying (they will continue firming up as they cool).
Store leftovers in a loosely sealed container at room temperature up to 2-3 days, or in the freezer for 1 month. We recommend storing them in the freezer once cooled to help retain their crispy exterior. These are so delicious when warm and dipped in homemade almond milk or a chai latte!
*If oil-free, you can try subbing additional almond butter (or other nut butter) or applesauce, but the cookies will not be as crisp or golden brown.
*Nutrition information is a rough estimate calculated with avocado oil and without optional ingredients.