Spray 3 9x9-inch pans with butter cooking spray and set them aside.
Follow the instructions to make these delicious Rice Krispie Treats. Only need to make a ½ batch. Place the freeze-dried strawberries in a food processor and blend until they become a powder. Set it aside.
Then, place the freeze-dried blueberries in a food processor and blend until they become a powder. Set it aside.
In a large pot over medium heat, melt 3 tablespoons of butter and add ⅛ teaspoon salt. Use a rubber spatula to spread some butter up the sides of the pot to help prevent sticking.
Pour in ⅓ cup of sweetened condensed milk and stir to mix it with the butter.
Add 6 ounces of mini marshmallows and stir continuously over medium heat until they are fully melted. Then, remove the pot from the heat.
Stir in ½ teaspoon vanilla, freeze-dried blueberry powder, and blue food coloring until everything is well combined. Add more food coloring if needed to get the desired color. Pour in 3 ½ cups of Rice Krispy cereal and use the rubber spatula to gently fold everything together until the cereal is evenly coated.
Pour the mixture into the prepared pan. Wet your hands, shake off the excess water, and gently press the mixture into the pan.
Repeat steps 5-9 to make the strawberry rice krispie treats, except omit the food coloring.
Leave the treats at room temperature for about an hour to cool and firm up. Using a rubber spatula, remove the treats from the pan and then cut them into squares with a knife. Enjoy!