01 - Preheat oven to 350°F and line two large baking sheets with parchment paper.
02 - In a large mixing bowl, cream unsalted butter, granulated sugar, and brown sugar together with an electric mixer until light and fluffy.
03 - Add creamy peanut butter, then the eggs one at a time, mixing thoroughly 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, blending just until combined.
06 - Gently fold in chocolate candies, chocolate chips, and mini pretzels if using.
07 - Scoop rounded tablespoons of dough onto prepared baking sheets, ensuring two inches of spacing between each.
08 - Bake for 10 to 12 minutes, until edges turn golden and centers remain soft.
09 - Allow to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.