Best Rice Krispies Treats

Bahan-bahan (12 porsi)

• 1/2 cup salted butter ((1 stick))
• 16 ounces fresh marshmallows (8 cups mini)
• 1/4 teaspoon kosher salt
• 1 teaspoon vanilla
• 1/4 teaspoon almond extract (optional)
• 1/4 teaspoon coconut extract (optional)
• 7 cups Rice Krispies cereal