Which food has less impact on blood sugar?

ICING SUGAR (SUGAR, CORNSTARCH), SUGAR, VEGETABLE OIL, SHORTENING (CANOLA OIL, PALM OIL, PALM KERNEL OIL, MONOGLYCERIDES, POLYSORBATE 60), WATER, CORN SYRUP, BLEACHED ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), EGGS, SOYBEAN AND/OR CANOLA OIL, SPRINKLES (ICING SUGAR [SUGAR, CORNSTARCH], MODIFIED CORNSTARCH, CORNSTARCH, PALM KERNEL OIL, CELLULOSE GUM, SOYBEAN LECITHIN, VANILLIN, POLYSORBATE 60, COLOR [FD&C YELLOW #5, FD&C RED #40, FD&C BLUE #1], SHELLAC), MARGARINE (SOYBEAN OIL, PALM OIL, WATER, SALT, WHEY [MILK], SOYBEAN LECITHIN, MONOGLYCERIDES, NATURAL FLAVOR, VITAMIN A PALMITATE, VITAMIN D3), MODIFIED CORNSTARCH, NONFAT DRY MILK, WHEY (MILK), COLOR (FD&C YELLOW #5, FD&C YELLOW #6 LAKE, FD&C BLUE #2 LAKE, FD&C YELLOW #5 LAKE, FD&C RED #3, FD&C BLUE #1, FD&C RED #40 LAKE), BUTTER (CREAM, SALT), MONO- AND DIGLYCERIDES, LEAVENING BLEND (SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, CORNSTARCH, MONOCALCIUM PHOSPHATE, CALCIUM SULFATE), SALT, NATURAL FLAVOR, EMULSIFIER (PROPYLENE GLYCOL MONO- AND DIESTERS OF FATS AND FATTY ACIDS, MONO-AND DIGLYCERIDES, SOYBEAN LECITHIN, CITRIC ACID [PRESERVATIVE]), DEXTROSE, WHEAT STARCH, SOYBEAN LECITHIN, CELLULOSE GUM.