01 - Preheat oven to 350°F. Line two large baking sheets with parchment paper.
02 - In a large bowl, beat together unsalted butter, granulated sugar, and packed light brown sugar until mixture is light and fluffy.
03 - Mix in creamy peanut butter. Add eggs one at a time, beating well after each addition. Stir in vanilla extract.
04 - In a separate bowl, whisk together old-fashioned oats, all-purpose flour, baking soda, and salt.
05 - Gradually add the dry mixture to the wet ingredients, mixing until just combined.
06 - Gently fold in red, white, and blue chocolate candies, semisweet chocolate chips, and mini pretzels if using.
07 - Using a cookie scoop or tablespoon, drop rounds of dough onto the prepared baking sheets, spacing each about 2 inches apart.
08 - Bake for 10 to 12 minutes, until edges are golden and centers remain soft.
09 - Let cookies cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.