Which food has less impact on blood sugar?

ICING SUGAR (SUGAR, CORNSTARCH), CARAMEL FILLING (WATER, SUGAR, CORN SYRUP, SWEETENED CONDENSED MILK [CONCENTRATED MILK, SUGAR, LACTOSE], HIGH FRUCTOSE CORN SYRUP, MODIFIED CORNSTARCH, CANOLA OIL, MODIFIED PALM AND PALM KERNEL OIL, BUTTER [CREAM, SALT], WHEY [MILK], SALT, PECTIN, CARRAGEENAN, XANTHAN GUM, NATURAL AND ARTIFICIAL FLAVOR, SODIUM ACID SULPHATE, POTASSIUM SORBATE [PRESERVATIVE], GELLAN GUM, TETRASODIUM PYROPHOSPHATE, CITRIC ACID, COLOR [CARAMEL, FD&C YELLOW #5, FD&C YELLOW #6, TITANIUM DIOXIDE]), SUGAR, VEGETABLE OIL SHORTENING (CANOLA OIL, PALM OIL, FRACTIONATED PALM OIL, FRACTIONATED PALM KERNEL OIL, MONOGLYCERIDES, POLYSORBATE 60), WATER, BLEACHED ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), EGGS, SOYBEAN AND/OR CANOLA OIL, NONFAT DRY MILK, MODIFIED CORNSTARCH, WHEY (MILK), MARGARINE (SOYBEAN AND MODIFIED PALM OILS, WATER, SALT, WHEY [MILK], SOYBEAN LECITHIN, MONOGLYCERIDES, NATURAL FLAVOR, VITAMIN A PALMITATE, VITAMIN D3, ANNATTO EXTRACT [COLOR]), COCOA POWDER (PROCESSED WITH ALKALI), MONO- AND DIGLYCERIDES, LEAVENING BLEND (SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, CORNSTARCH, MONOCALCIUM PHOSPHATE, CALCIUM SULFATE), NATURAL AND ARTIFICIAL FLAVOR, SALT, CORN SYRUP, EMULSIFIER (PROPYLENE GLYCOL MONO- AND DIESTERS OF FATS AND FATTY ACIDS, MONO- AND DIGLYCERIDES, SOYBEAN LECITHIN, CITRIC ACID [PRESERVATIVE]), SEA SALT, SOYBEAN LECITHIN, CARAMEL COLOR.