Preheat the oven to 350 degrees F (175 degrees C).

Beat butter and maple syrup together with an electric mixer in a large bowl until smooth. Stir flour and salt together in a separate bowl; gradually mix flour mixture into butter mixture until dough is just incorporated. Form dough into walnut-sized balls; flatten gently and arrange onto a baking sheet.

Bake in the preheated oven until edges are lightly browned, 10 to 12 minutes.