Stir the “glue.” In a mixing bowl, combine peanut butter, honey (or maple), vanilla, and salt. Stir until glossy and smooth.
Add the bulk. Toss in oats, ground flax/chia, and any dry add-ins. Fold everything together until the oats are evenly coated—no dry patches.
Chill the dough. Pop the bowl in the fridge for 15–20 minutes. This makes rolling way easier and keeps the balls from sticking to your hands.
Roll 'em. Scoop about 1 tablespoon per ball (a mini cookie scoop is clutch) and roll into tight spheres. Press gently if they crumble—warmth from your hands helps them bind.
Set and serve. Place on a parchment-lined tray and refrigerate 20 more minutes to firm up. Serve immediately or store for later.
Make it lunchbox-proof. If your kid's school is nut-free, see the swap ideas below and keep them chilled before packing.