Preheat oven to 250°F (120°C). Line a rimmed sheet pan with a silicone liner or parchment paper. This step is crucial to prevent the candies from sticking to the pan.
Lay the pretzels in a single layer on the prepared sheet pan. Place an unwrapped Rolo on each pretzel. Bake in the preheated oven for about 2–4 minutes. The Rolos should be soft but not melted (see note 2).
Immediately after taking the pretzels out of the oven, press an edible eye or M&M onto each softened Rolo.
Let the pretzel bites sit at room temperature for about 45 minutes. This allows the Rolos to harden back up. If you need to speed this process up, pop them into the fridge for about 15 minutes.
Video
Notes
Note 1: You can either opt for regular M&M’s and sift through them to get the Halloween shades or snag a bag of Halloween-themed M&M’s. You’ll typically find edible eye candies in the baking aisles of many stores, at specialty shops, or online. I usually only find the super-sized ones online.Note 2: It’s essential to monitor the chocolate during baking. If it crumbles, it indicates the oven temperature was too high, or they baked too long. If the M&M’s/eyes don’t press into the chocolate smoothly, it means the oven was not hot enough or the chocolates weren’t baked long enough. It’s helpful to test-bake a single Rolo-topped pretzel to gauge the optimal baking time for your oven. Then you can adjust the baking time for the rest. Avoid using the oven’s convection.Storage: Store Monster Eyeballs in an airtight container at room temperature for up to a week. For longer storage, refrigerate for up to 2 weeks or freeze for up to 2 months.