Which food has less impact on blood sugar?

ICED CAKE: CAKE MIX (BLEACHED ENRICHED FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], SUGAR, FOOD STARCH-MODIFIED, DRIED WHEY, CONTAINS 2% OR LESS OF COCOA PROCESSED WITH ALKALI, SALT, WHEAT GLUTEN, PROPYLENE GLYCOL MONOESTER OF FATS AND FATTY ACIDS, MONO- AND DIGLYCERIDES, SOY LECITHIN, SODIUM ALUMINUM PHOSPHATE, SODIUM BICARBONATE, SODIUM STEAROYL LACTYLATE, NATURAL AND ARTIFICIAL FLAVOR, RED 40), EGGS, SOY OIL, WATER, CHOCOLATE ICING (SUGAR, WATER, PARTIALLY HYDROGENATED SOY AND COTTONSEED OILS, CORN SYRUP, COCOA, HIGH FRUCTOSE CORN SYRUP, CHOCOLATE LIQUOR, SOY OIL, FOOD STARCH-MODIFIED, SOY LECITHIN, PROPYLENE GLYCOL, SALT, MONO- AND DIGLYCERIDES, NATURAL FLAVOR, POTASSIUM SORBATE [PRESERVATIVE]), SOUR CREAM (CULTURED MILK AND CREAM, WHEY, MODIFIED CORNSTARCH, SODIUM PHOSPHATE, POTASSIUM SORBATE [PRESERVATIVE], GUAR GUM, CARRAGEENAN, CALCIUM SULFATE, LOCUST BEAN GUM). CREAM CHEESE ICING: POWDERED SUGAR (SUGAR, CORNSTARCH), SUGAR, CREAM CHEESE (PASTEURIZED MILK AND CREAM, BACTERIAL CULTURE, SALT, LOCUST BEAN GUM, XANTHAN GUM, GUAR GUM), MARGARINE (PARTIALLY HYDROGENATED SOYBEAN OIL, WATER, PARTIALLY HYDROGENATED COTTONSEED OIL, SALT, MONO-AND DIGLYCERIDES, COLORED WITH ANNATTO EXTRACT AND TURMERIC, CALCIUM DISODIUM EDTA [PRESERVATIVE], ARTIFICIAL FLAVOR, VITAMIN A PALMITATE), WATER, GLUCOSE SYRUP, VANILLA EXTRACT, NATURAL AND ARTIFICIAL FLAVOR. SWEET CHOCOLATE CURLS: SUGAR, CHOCOLATE LIQUOR, COCOA BUTTER, BUTTER OIL, SOY LECITHIN, VANILLA EXTRACT.