Measure your blood glucose level at snack-time.
||Calculate the carbohydrate content of your snack in grams (one sandwich = 15 gr., one glass of milk = 10 gr.)
||Calculate the carbohydrate content of the ice-cream.
||Take one unit of extra insulin for every 10 gr. of excess carbohydrate in the ice-cream.
||Decrease the dose by 1-2 U. if the blood glucose level before the ice-cream is less than 100 mg/dl. or if you are about to exercise. Increase by 1-2 U. if the blood glucose level is above 180 mg/dl.
||If you are in the remission phase you should only take 1/4 or 1/2 of the above mentioned extra fosses of insulin.
||Measure you blood glucose level 1 and 1-1/2 hour after you have finished the ice-cream to see if things worked out the way you expected.
||Document what you did in your logbook and you will be better equipped the next time you feel like eating ice-cream.