01 - Preheat oven to 350°F and line two large baking sheets with parchment paper.
02 - Cream together softened butter, granulated sugar, and brown sugar in a large bowl using an electric mixer until light and fluffy.
03 - Mix in peanut butter until smooth. Add eggs, one at a time, mixing thoroughly after each. Blend in vanilla extract.
04 - In a separate bowl, whisk together oats, all-purpose flour, baking soda, and salt.
05 - Gradually add dry mixture to wet ingredients, mixing gently until just combined to avoid overworking the dough.
06 - Stir in chocolate candies, semisweet chocolate chips, and crushed pretzels if using.
07 - Scoop rounded tablespoons of dough onto prepared baking sheets, spacing each piece approximately two inches apart.
08 - Bake for 10 to 12 minutes, until edges are golden and centers remain slightly soft.
09 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.