Preheat oven to 350°F. Line 2 baking sheets with parchment paper.
In a large bowl, mix almond butter, granulated sugar, and brown sugar until smooth and creamy.
Beat in the egg and vanilla until fully incorporated and the mixture thickens slightly.
Sprinkle in baking soda and salt; stir just until combined. Fold in chocolate chips, if using.
Scoop dough by 1 tablespoon portions, roll into balls, and set on prepared sheets about 2 inches apart. Lightly flatten each ball and press a few sliced almonds on top, if using.
Bake 9 to 11 minutes, until edges are set and tops are lightly crackled. Do not overbake.
Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
Notes
For extra texture, sprinkle a pinch of flaky sea salt on warm cookies. Store in an airtight container at room temperature for up to 4 days or freeze up to 2 months.