Separate Lucky Charms cereal into the cereal and marshmallows. Add the cereal pieces to a large mixing bowl with mini pretzels.
Heat white chocolate chips in the microwave or on a double boiler. If using a microwave, heat at 30 second intervals to make sure it does not burn. Mix 10 drops of green food coloring into the white chocolate.
Pour melted green white chocolate over the cereal and pretzels. Toss with a spatula until fully coated. Add Lucky Charms marshmallows and sprinkles to the bowl and mix again.
Spread snack mix onto a lined baking sheet and allow to cool completely then enjoy!