In a large bowl, beat together the peanut butter, butter, brown sugar and agave or honey vigorously with a fork, or with a handheld electric mixer on low-speed, until just combined. Stir in the vanilla, oats, and flour until a soft dough forms.
Roll the dough into teaspoon-sized balls in the palm of your hand. Gently roll the balls into the finely chopped sundae peanuts to cover. Place the garnished cookie dough balls onto a foil-lined plate or small baking sheet.
Briefly freeze the dough balls for about 20 minutes or until firm. Eat up! Store leftover dough balls (which there won’t be any) covered in the fridge or freezer. They also taste great at room temperature!