Remove the sugar mixture from heat and immediately stir in the peanut butter, vanilla extract, and oats until well combined.
Drop spoonfuls (I like to use this cookie scoop) onto prepared baking sheets and allow to set at room temperature until cooled and hardened, about 30 minutes.
Notes
Store in an airtight container at room temperature for up to one week.
For long-term storage, freeze the cookies in an airtight container for up to 3 months. Thaw to room temperature before serving.
No Bake Cookie Recipe FAQ
Why did my no bake cookies not set?
The most common cause of no-bake cookies not setting is that they didn’t boil long enough. Be sure to wait until the mixture has reached a rolling boil then boil for a 60 seconds. Another cause could be the weather. Yes, the weather! Very humid or rainy weather can mess with the setting process. If you find this is an issue, I suggest placing the cookies in the fridge to help them harden.
Do no bake cookies have to be refrigerated?
No, the yummy cookies do not need to be refrigerated, although you can refrigerate them if you like. No bake cookies can be stored in an airtight container at room temperature for up to one week.
Can no-bake cookies be frozen?
Yes! Freeze set and cooled cookies in an airtight container for up to 3 months. Thaw to room temperature before serving.
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