Gather all necessary ingredients and equipment.
Line a baking sheet with parchment or wax paper.
In a large saucepan, combine sugar, water, butter, and salt over medium heat. Stir until sugar dissolves. Bring to a boil and cook for 2-3 minutes until it reaches 235°F (118°C) or forms a soft ball in cold water.
Remove from heat, stir in vanilla and maple syrup. Add mixed nuts and coat evenly.
Pour mixture onto a prepared baking sheet and spread evenly. Cool for about 30 minutes until it hardens.
Break candy into bite-sized pieces and serve your homemade maple nut goodies.