01 - Preheat oven to 350°F and line two large baking sheets with parchment paper.
02 - Using an electric mixer, cream the softened butter, granulated sugar, and brown sugar in a large bowl until the mixture is light and fluffy.
03 - Blend peanut butter into the creamed mixture. Add eggs one at a time, mixing thoroughly after each addition, then stir in vanilla extract.
04 - In a separate bowl, whisk together oats, all-purpose flour, baking soda, and salt until evenly combined.
05 - Gradually incorporate the dry mixture into the wet ingredients, mixing just until combined to avoid overmixing.
06 - Fold in chocolate candies, semisweet chocolate chips, and mini pretzels, if using, ensuring even distribution throughout the dough.
07 - Use a cookie scoop or tablespoon to place rounded tablespoons of dough onto prepared baking sheets, spacing about two inches apart.
08 - Bake at 350°F for 10 to 12 minutes, until edges are golden and centers remain soft.
09 - Allow cookies to rest on baking sheets for 5 minutes before carefully transferring to a wire rack to finish cooling.