01 - Preheat the oven to 350°F and line two large baking sheets with parchment paper.
02 - In a large mixing bowl, beat together unsalted butter, granulated sugar, and packed light brown sugar until the mixture is light and fluffy.
03 - Blend in creamy peanut butter, then add eggs one at a time, thoroughly mixing 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 dry ingredients to the wet mixture, combining just until incorporated.
06 - Gently fold in red, white, and blue chocolate candies, semisweet chocolate chips, and mini pretzels if using.
07 - Scoop rounded tablespoons of dough onto prepared baking sheets, spacing each portion two inches apart.
08 - Bake for 10 to 12 minutes or until the edges are golden while centers remain soft.
09 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.