Preheat the oven to 300°F (150°C). Line a baking sheet with a silicone mat or aluminum foil.
STEP 2
Toss pumpkin seeds and melted butter together in a bowl. Sprinkle on garlic salt, onion salt, and paprika; toss to evenly coat. Spread on the prepared baking sheet.
STEP 3
Bake in the preheated oven until golden and crisp, stirring halfway through, about 45 minutes. Let cool; store in an airtight container. They taste amazing warm, too.