Preheat and prep: Heat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone mat.
Mix the wet: In a medium bowl, stir the almond butter, sugar, egg white, and vanilla until smooth and glossy. If using aquafaba, whisk it lightly first so it’s frothy before adding.
Add the dry: Sprinkle in the salt, baking soda, and almond flour.
Stir just until combined. The dough should be thick but scoopable.
Portion: Use a small cookie scoop or a tablespoon to portion 12 mounds onto the sheet, spacing them about 2 inches apart.
Shape: Lightly dampen your fingertips and press each mound into a 2-inch round. For a classic look, use a fork to make a gentle crosshatch.
Bake: Bake for 8–10 minutes, until the edges look set and the centers still appear soft.
They will firm up as they cool.
Cool: Let cookies rest on the sheet for 5 minutes, then transfer to a rack. Cool completely for the best texture.
Enjoy: Once cool, the cookies should have a tender middle and light crisp edges. Store any extras as directed below.