To make a Grimace Shake, you will need the following ingredients:

• Vanilla ice cream (about 3 scoops)
• Frozen blueberries (1 cup)
• Fresh raspberries (½ cup)
• Milk (½ to 1 cup, depending on desired thickness)
• Optional: blue spirulina powder (½ teaspoon) for enhanced purple color
• Whipped cream and sprinkles for garnish (optional)

Instructions:

1. Let the vanilla ice cream soften slightly at room temperature for easier blending.
2. Add the ice cream, frozen blueberries, fresh raspberries, milk, and blue spirulina (if using) into a blender.
3. Blend until smooth and the fruit is fully broken down.
4. Pour the milkshake into a glass or glasses.
5. Top with whipped cream and sprinkles if desired.
6. Serve with a straw and enjoy your purple Grimace Shake!

This recipe creates a creamy, fruity shake with a vibrant purple color reminiscent of the McDonald's Grimace Shake. The blue spirulina is optional but adds a nice hue without affecting flavor. You can customize the shake by using different vanilla ice cream varieties or adding more toppings to suit your taste