Prepare the mixture

• In a bowl, combine sugar and cornstarch.
• Add softened butter and mix until crumbly.
• Stir in a few drops of food coloring until the desired hue is achieved.

Form and bake

• Spread the colored mixture onto a parchment-lined baking sheet in a thin layer.
• Bake in a preheated oven at 150°C (300°F) for 10 minutes, stirring halfway through.

Cool and break into sprinkles

• Allow the baked sheet to cool completely.
• Break the hardened sheet into small sprinkle-sized pieces.
• Store in an airtight container.