Which food has less impact on blood sugar?

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