Butter an 11x17-inch rimmed baking sheet or Pyrex dish. Set aside.
Melt butter in a small saucepan over medium heat. Stir in sugar and honey. Bring to a boil. Cook, without stirring, until mixture is medium amber and a candy thermometer registers 280°F, about 6 minutes.
¼ cup butter, ½ cup packed light brown sugar, ¼ cup honey
Stir in the pumpkin seeds. Cook until mixture reaches 300°F, about 2 minutes.
½ cup roasted pepitas (pumpkin seeds)
Pour into prepared pan. Let cool completely. Break into pieces.
Notes
Rather than use ½ cup pepitas, you can use 1 cup fresh pumpkin seeds (in the shell) that have been roasted. Source: Adapted from Martha StewartYou're Gonna Bake It After Allbakeitafterall.com