Rice Krispies Shamrocks are the perfect festive treat to celebrate St. Patrick’s Day, combining fun and flavor into a delightful dessert. With their vibrant green color and easy preparation, these delicious bars are sure to become a favorite for kids and adults alike!
Tint Rice Krispies Shamrocks Green
Make a St. Patrick’s Day treat out of crispy rice bars using a shamrock cookie cutter and green food coloring. You can also use green Peeps or green marshmallows if you can find them. However, the easiest way to make these green bars is to use white miniature marshmallows and food coloring.
Add the green food coloring to the hot, melted marshmallows. Gels or liquid dye will easily mix into the hot mixture. Start with 2 or 3 drops and add more if you want a darker green bar. You can vary the shade of green by adding a drop of yellow or blue food coloring. Stir until the mixture is a uniform color.
Finally, you can make these shamrock treats by omitting the coloring but cutting them into shapes with a shamrock cookie cutter. They will still be festive!

Add the Cereal
Add the cereal and mix well, coating all of it with the green marshmallows. Then pour it into a large butter-greased pan. A shallow sheet pan with sides works best because its shallowness helps keep the cereal from being too thick, making it easier to cut with the cookie cutter.

Use Parchment Paper for Rice Krispies Shamrocks
The best way to spread the sticky cereal bars is to place a sheet of parchment paper over them. Then press with your hand or a large spoon, and the cereal mixture will spread without sticking. Spread the mixture to a 1/2-inch depth for even bars. It is okay if the mixture doesn’t cover the whole sheet pan, but keep the edge 1/2 inch thick. Then cut the cereal mixture with a shamrock cookie cutter.

Sometimes it helps to grease the cookie cutter with butter to help it cut through the cereal. Use a small folded towel to help press the cookie cutter through the cereal mixture if you don’t have one with a “comfort” grip.

Re-Form Leftover Scraps
Reform all the leftover scraps and cut shamrocks from them. Be careful not to press the cereal too hard when reforming it, or you will crush it, making smooth-looking bars. You can eat these bars yourself because they taste the same. Enjoy!

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Crispy Rice Shamrocks
Equipment
- (1) 3-inch shamrock cookie cutter
- waxed or parchment paper
- 1 large sheet pan with sides
Ingredients
- ½ cup salted butter
- 10 ounces miniature marshmallows
- ½ teaspoon vanilla
- 2-3 drops green gel food coloring
- 5 cups crispy rice cereal
- extra butter
Instructions
- Use the extra butter to coat the bottom and sides of the sheet pan. Set aside.
- In a large pot, melt the butter on low. Before the butter completely melts, add the marshmallows. Stir until the marshmallows are melting. Turn off the heat. Continue to stir until melted. Add the vanilla and green food coloring and stir. Add extra drops of color, if needed, until you reach the desired green color.
- Add the cereal and stir until coated with the marshmallow mixture.
- Place the mixture into the buttered pan. Place a sheet of waxed or parchment paper over the cereal mixture and press until evenly spread out in the pan. Use the cookie cutter to cut shamrocks. Press together any leftover mixture and repeat cutting shamrocks. Store in a container with waxed paper between layers to keep the shamrocks from sticking together.
