01 - Preheat oven to 350°F (175°C) and line two large baking sheets with parchment paper.
02 - In a large bowl, beat together the softened butter, granulated sugar, and brown sugar using an electric mixer until light and fluffy.
03 - Add creamy peanut butter to the bowl. Beat in eggs, one at a time, ensuring each is fully blended before adding the next. Stir in vanilla extract.
04 - In a separate bowl, whisk together old-fashioned oats, all-purpose flour, baking soda, and salt until uniformly mixed.
05 - Gradually incorporate the dry mixture into the wet mixture, mixing until just combined. Do not overmix.
06 - Fold in chocolate candies, semisweet chocolate chips, and crushed mini pretzels if desired.
07 - Scoop rounded tablespoons of dough and place onto prepared baking sheets, spacing each mound two inches apart.
08 - Bake for 10 to 12 minutes, or until edges are golden and centers remain slightly soft.
09 - Allow cookies to cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.