Place sheets of wax paper on two baking sheets and set aside. Measure out the ingredients in advance so they are ready to use since you will need to work fast when making this recipe.
Combine sugar, butter, and milk in a large saucepan over medium-high heat. Stirring frequently until the butter has melted.
2 cups granulated sugar, ½ cup salted butter, ½ cup whole milk
As soon as the mixture starts to bubble in the middle, set a time for 60 seconds. Let the mixture come to a rolling boil and cook for 60 seconds, then immediately remove from heat.
Immediately stir in the oats, cookie butter, and vanilla until fully incorporated.
3 cups 1-minute oats, ¾ cup cookie butter, 1 tablespoon vanilla extract
Quickly drop the mixture onto the wax paper-lined baking sheets using a medium cookie scoop or wooden spoon.
Let cool for at least 30 minutes to set.