01 -
Grease a 9x9-inch baking pan or line it with parchment paper for easy removal.
02 -
In a large saucepan, melt the butter over low heat. Add the mini marshmallows and stir continuously until completely melted and smooth. Incorporate the lemon zest and lemon extract if using.
03 -
Remove the saucepan from heat and immediately fold in the Rice Krispies cereal until evenly coated.
04 -
Press the mixture evenly into the prepared pan using a buttered spatula or wax paper. Avoid pressing too firmly to maintain a soft, chewy texture.
05 -
Melt the white chocolate chips in the microwave in 20-second increments, stirring until smooth. Drizzle evenly over the bars and finish with a sprinkle of lemon zest or fine lemon peel curls.
06 -
Allow the treats to cool and set for at least 30 minutes before cutting into squares and serving.