Which food has less impact on blood sugar?

ICING SUGAR (SUGAR, CORNSTARCH), SHORTENING (CANOLA OIL, PALM OIL, MODIFIED PALM OIL, MODIFIED PALM KERNEL OIL, MONOGLYCERIDES, POLYSORBATE 60), SUGAR, WATER, BLEACHED ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), EGG, SOYBEAN OIL, CANOLA OIL, APPLE FILLING (APPLES, SUGAR, WATER, CORN SYRUP, MODIFIED CORNSTARCH, MALIC ACID, SALT, SPICE, SODIUM BENZOATE [PRESERVATIVE], NATURAL FLAVOR, SODIUM CITRATE, LOCUST BEAN GUM, XANTHAN GUM, CARRAGEENAN), CARAMEL FILLING (CORN SYRUP, SUGAR, WATER, SWEETENED CONDENSED MILK [CONCENTRATED MILK, SUGAR, LACTOSE], CANOLA OIL, MODIFIED PALM OIL, MODIFIED PALM KERNEL OIL, WHEY, MODIFIED TAPIOCA STARCH, SALT, PECTIN, CARRAGEENAN, XANTHAN GUM, POTASSIUM SORBATE [PRESERVATIVE], ARTIFICIAL AND NATURAL FLAVOR, TETRASODIUM PYROPHOSPHATE, CITRIC ACID), NONFAT DRY MILK, MODIFIED CORNSTARCH, BUTTER (CREAM, SALT), BAKING POWDER (SODIUM BICARBONATE, SODIUM ALUMINUM PHOSPHATE, SODIUM ACID PYROPHOSPHATE, CORNSTARCH, MONOCALCIUM PHOSPHATE, CALCIUM SULFATE), SOY LECITHIN, VITAL WHEAT GLUTEN, GRAHAM FLAVORED CRUMBS (BREAD CRUMB [BLEACHED ENRICHED WHEAT FLOUR {WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID}, SUGAR, YEAST, SALT, CARAMEL COLOR, YELLOW CORN FLOUR, PAPRIKA EXTRACT COLOR, ANNATTO EXTRACT COLOR], BROWN SUGAR, CANOLA OIL, ARTIFICIAL FLAVOR), CORN SYRUP, SALT, ARTIFICIAL AND NATURAL FLAVOR, MONO- AND DIGLYCERIDES, DATEM, CARAMEL COLOR, MOLASSES.