01 - Preheat oven to 350°F and line two large baking sheets with parchment paper.
02 - In a large mixing bowl, beat butter, granulated sugar, and brown sugar until light and fluffy using an electric mixer.
03 - Blend in peanut butter, then add eggs one at a time, mixing thoroughly after each. Stir in vanilla extract.
04 - In a separate bowl, whisk together oats, all-purpose flour, baking soda, and salt.
05 - Gradually mix the dry ingredients into the wet mixture until just combined.
06 - Gently fold in the red, white, and blue chocolate candies, semisweet chocolate chips, and mini pretzels if using.
07 - Scoop rounded tablespoons of dough onto the prepared baking sheets, leaving a two-inch space between each portion.
08 - Bake for 10 to 12 minutes until edges are golden and centers remain soft.
09 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.