Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat.
In a large bowl, combine 1 cup creamy peanut butter, 1/2 cup granulated sugar, and 1/2 cup packed brown sugar. Beat until creamy and well combined.
Add 1 large egg and 1 teaspoon vanilla extract, mixing until smooth.
Sprinkle in 1/2 teaspoon baking soda and 1/2 teaspoon salt, then gradually add 1 cup all-purpose flour. Stir gently until just combined.
Fold in 1 cup pretzel nuggets and 1/2 cup chocolate chips.
Using a spoon or cookie scoop, scoop about 2 tablespoons of dough. Roll into a ball and flatten slightly. Optionally, press a few extra pretzels and chocolate chips into the center, then cover with more dough and reseal.
Place cookies about 2 inches apart on the baking sheet. Bake for 10 to 12 minutes until edges are set and tops start to crack.
Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.