Line an 8x8 pan with parchment and spray lightly.
Heat peanut butter, honey, and butter in a small pot over low heat. Stir until smooth.
Remove from heat. Stir in vanilla and salt.
Mix oats into the peanut butter mixture until coated.
Press half the oat mix into the pan firmly.
Melt chocolate chips in a bowl over simmering water or in 20-second bursts in microwave. Stir until glossy.
Pour chocolate over pressed layer and spread evenly.
Crumble remaining oat mix over chocolate and press lightly.
Chill at least 1 hour. Cut into bars.