Line the pan: Line an 8x8-inch square pan with parchment paper, leaving overhang for easy lifting.
Warm the base: In a small saucepan over low heat, gently warm 1 cup almond butter with 1/2 cup honey or maple syrup, stirring until smooth and slightly loosened. Do not boil.
Add flavor boosts (optional): Stir in 1/2 teaspoon vanilla extract and a pinch of salt if using.
Mix with oats: In a large bowl, add 2 1/2 cups gluten-free rolled oats. Pour the warm almond butter mixture over the oats.
Stir until every oat is well coated and the mixture feels thick and sticky.
Press firmly: Transfer the mixture to the lined pan. Press it down very firmly using a spatula or the back of a measuring cup. Pack it as tightly as possible for clean slices.
Chill to set: Refrigerate for 1–2 hours, or until the bars are firm enough to slice.
For a quicker set, place in the freezer for 25–30 minutes.
Slice and store: Lift the slab out using the parchment. Cut into 12–16 bars or squares, depending on your preferred size.
Optional baked version: For a slightly toastier flavor, bake at 325°F (165°C) for 12–15 minutes, then cool completely before cutting.