Gather your ingredients and equipment—this keeps the process smooth and fun.
Melt the butter in a large saucepan over low heat, stirring occasionally until it’s just shimmering and starts to smell rich, about 3-4 minutes.
Add the marshmallows to the melted butter and stir constantly with a spatula until fully melted and smooth. This should take about 5 minutes, and the mixture will turn glossy and fragrant.
Remove the saucepan from heat and quickly fold in the Rice Krispies cereal, stirring gently to coat everything evenly without crushing the cereal.
Spray your 9x13 inch pan with butter or non-stick spray to prevent sticking. Using a spatula or buttered hands, press the cereal mixture evenly into the pan, smoothing the top but not pressing too firmly.
Sprinkle a pinch of sea salt over the top for that perfect salty-sweet balance. If you’re adding chocolate chips or sprinkles, scatter them on now for extra texture and flavor.
Let the treats set at room temperature for at least 30 minutes, or chill in the fridge for a quicker finish. Once firm, use a sharp knife to cut into squares.
Enjoy your monster Rice Krispie treats—chewy, crispy, and perfectly salty-sweet! Share with friends or keep for yourself as a fun, indulgent snack.