Place the mini marshmallows into a large, microwave safe bowl. Heat in the microwave in 30 second increments, stirring each time, until completely melted. This will take about 2-3 minutes.
4 cups mini marshmallows
Add the butter, corn syrup, and salt and stir until combined.
3 ½ tablespoons unsalted butter, 2 teaspoons corn syrup, ½ teaspoon salt
Add a few drops of green food coloring and mix until the marshmallows are all green.
Green food coloring
Place the cornflakes into a large mixing bowl. Spoon the marshmallow mixture over the cornflakes. Mix well until the cornflakes are completely coated with the marshmallow mixture. This may take several minutes.
4 cups cornflakes
Line a baking sheet with parchment paper. Spray your hands with baking spray for ease of shaping.
Separate the cornflakes into 8 balls. Press a finger into the center of each ball to form the middle of each wreath and shape each wreath.
Place 3 Red Hot candies onto the top of each wreath. Let set, uncovered for 2 hours to allow the marshmallow to dry before serving.
½ cup Red Hots