Heat oven to 350°F. Rinse pumpkin seeds; remove any pulp and fiber. Pat seeds dry with paper towels. Spread seeds in ungreased 15x10x1-inch baking pan. Sprinkle with oil; stir to coat.
Bake at 350°F. for 15 to 20 minutes or until deep golden brown and crisp, stirring once.
Sprinkle warm seeds with taco seasoning mix. Cool 10 minutes or until completely cooled before serving.