Line a 9x13 inch baking dish with parchment paper or grease it lightly with butter or non-stick spray. This makes it easier to remove the treats once they've cooled.
Melt the Butter and Marshmallows
In a large saucepan, melt 4 tablespoons of butter over low heat. Once the butter is melted, add in 10 oz of gluten-free marshmallows. Continue stirring until the marshmallows are smooth and melted. Keeping the heat low ensures a soft, gooey texture for your treats.
Pro Tip: Avoid using high heat as it can make the marshmallows harden too quickly, which will make the treats too stiff.
Add Vanilla and Salt
If you're using vanilla extract and salt, add them to the melted marshmallow mixture. The vanilla gives the treats a subtle flavor boost, while the salt balances the sweetness.
Stir in the Gluten-Free Cereal
Remove the saucepan from heat and gradually add 6 cups of gluten-free crispy rice cereal. Stir well to ensure every piece of cereal is evenly coated with the marshmallow mixture.
Pro Tip: Use a non-stick spray or butter on your spatula to prevent sticking as you mix.
Press the Mixture into the Pan
Transfer the mixture to your prepared pan. Gently press it into an even layer using the back of a buttered spatula or wax paper. Be careful not to press too hard, as this can make the treats dense.
Let It Cool and Slice
Allow the treats to cool for about 30 minutes at room temperature. Once set, lift them out of the pan using the parchment paper and cut them into squares.