Combine butter and corn syrup together in a small bowl.
Add 2 cups powdered sugar and your choice of extract and beat until well combined. Add extract 1/2 teaspoon at a time until the mixture reaches your desired flavor.
Stir in an additional cup of powdered sugar.
Turn bowl onto a cutting board sprinkled with last cup of powdered sugar.
Knead the mixture until sugar is absorbed and is completely smooth.
Divide dough into four portions.
Tint one portion pink, one green, one blue and one yellow.
Shape into 3/4 inch balls and roll in granulated sugar.
Flatten gently with a fork.
Let candies stand, uncovered, at room temperature for 1 day.
Store in an airtight container.