01 - Preheat oven to 350°F. Line two large baking sheets with parchment paper.
02 - In a large mixing bowl, beat together the softened butter, granulated sugar, and light brown sugar using an electric mixer until pale and fluffy.
03 - Add the peanut butter to the butter mixture, then mix in eggs one at a time, beating well after each. Stir in the vanilla extract.
04 - In a separate bowl, whisk together the oats, all-purpose flour, baking soda, and salt until well incorporated.
05 - Gradually add the dry mixture to the wet ingredients, beating at low speed until just combined.
06 - Gently fold in the chocolate candies, semisweet chocolate chips, and crushed mini pretzels if using.
07 - Scoop rounded tablespoons of dough onto prepared baking sheets, placing each portion two inches apart to allow for spreading.
08 - Bake for 10 to 12 minutes until the edges are golden and the centers appear soft.
09 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.