Have just made 3oz butter, 6oz icing sugar and l tbsp water butter icing which I put green food colouring into on a Halloween theme! [hconfused] Put a drop in and decided not green enough, tasted fine. Put another drop in and not sure it tastes that good anymore, bit acidic. Kids say it's fine. Had this once with red food colouring when overdid it and it tasted foul. What are you supposed to do and have I probably overdone it?