Use gel food colors, rather than liquid. Using liquid food dyes adds extra moisture to the batter and can ruin the consistency of your macarons.
Calories: 222kcal | Carbohydrates: 34g | Protein: 3g | Fat: 9g | Saturated Fat: 4g | Polyunsaturated Fat: 0.2g | Monounsaturated Fat: 1g | Trans Fat: 0.2g | Cholesterol: 14mg | Sodium: 56mg | Potassium: 22mg | Fiber: 1g | Sugar: 32g | Vitamin A: 170IU | Vitamin C: 0.01mg | Calcium: 19mg | Iron: 0.3mg