Which food has less impact on blood sugar?

ICING SUGAR (SUGAR, CORNSTARCH), SUGAR, WATER, SOYBEAN AND/OR CANOLA OIL, BLEACHED ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), VEGETABLE OIL SHORTENING (CANOLA OIL, PALM OIL, PALM KERNEL OIL, MONOGLYCERIDES, POLYSORBATE 60), CHOCOLATE FLAVORED FILLING (WATER, SUGAR, CORN SYRUP, MODIFIED CORNSTARCH, COCOA POWDER [PROCESSED WITH ALKALI, CARAMEL COLOR, SODIUM ACID SULFATE, SALT, NATURAL AND ARTIFICIAL FLAVOR, POTASSIUM SORBATE [PRESERVATIVE), AGAR-AGAR, TITANIUM DIOXIDE [COLOR]), EGGS, CORN SYRUP COCOA POWDER (PROCESSED WITH ALKALI), CHOCOLATE LIQUOR, MARGARINE (SOYBEAN OIL, PALM OIL, WATER, SALT. WHEY [MILK), SOYBEAN LECITHIN, MONOGLYCERIDES, NATURA FLAVOR, VITAMIN A PALMITATE, VITAMIN D3), MODIFIED CORNSTARCH, WHEY (MILK), NONFAT DRY MILK, CHOCOLATE SPRINKLES (SUGAR, UNSWEETENED CHOCOLATE COCOA POWDER [PROCESSED WITH ALKALI, MILK FAT, SOYBEAN LECITHIN [EMULSIFIER), NATURAL FLAVOR), LEAVENING BLEND (SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, CORNSTARCH, MONOCALCIUM PHOSPHATE, CALCIUM SULFATE), MONO- AND DIGLYCERIDES, BUTTER (CREAM, SALT), SALT, EMULSIFIER (PROPYLENE GLYCOL MONO-AND DIESTERS OF FATS AND FATTY ACIDS, MONO- AND DIGLYCERIDES, SOYBEAN LECITHIN, CITRIC ACID (PRESERVATIVE]), NATURAL FLAVOR, SOYBEAN LECITHIN.