Preheat oven to 350 degrees Fahrenheit. Line baking sheets with parchment paper and set aside.
In a large bowl, beat butter with sugars until creamy. Add peanut butter and beat well.
Add eggs and vanilla; beat until combined. Stir in flour, oats, and baking soda until just blended.
Fold in chocolate chips and candy bits.
Drop dough by 2 tablespoon portions onto prepared sheets. Bake 12 to 15 minutes until lightly browned. Cool on the pan briefly, then transfer to a wire rack.
Store in an airtight container for up to one week.
Notes
These monster cookies stay chewy and are perfect for bake sales, after school snacks, or potlucks.