Which food has less impact on blood sugar?

CHOCOLATE CAKE (SUGAR, ENRICHED WHEAT FLOUR BLEACHED [FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], COCOA PROCESSED WITH ALKALI, FOOD STARCH-MODIFIED, SOYBEAN OIL, CONTAINS 2% OR LESS, OF: CARAMEL COLOR, EGGS, LEAVENING [BAKING SODA, MONOCALCIUM PHOSPHATE, SODIUM ALUMINUM PHOSPHATE], MONO- AND DIGLYCERIDES, NATURAL AND ARTIFICIAL FLAVOR, PROPYLENE GLYCOL MONO- AND DIESTERS OF FATTY ACIDS, RED 40, SALT, SODIUM STEAROYL LACTYLATE, SOY LECITHIN, WHEY), FROSTING (WATER, SUGAR, HYDROGENATED PALM KERNEL OIL, DEXTROSE, SODIUM CASEINATE. CONTAINS LESS THAN 2% OF THE FOLLOWING: CITRIC ACID, POLYSORBATE 80, SALT, XANTHAN GUM, POLYSORBATE 60, CARBOHYDRATE GUM, POLYGLYCEROL ESTERS OF FATTY ACIDS, POTASSIUM SORBATE, MONO AND DIGLYCERIDES), WATER, CONFECTIONER'S SUGAR (SUGAR, CORNSTARCH), SOYBEAN OIL, EGGS, SUGAR FONDANT (SUGAR, CORN SYRUP, WATER), VEGETABLE SHORTENING (SOYBEAN OIL, HYDROGENATED SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60, TBHQ AND CITRIC ACID ADDED TO HELP PRESERVE FRESHNESS), CHOCOLATE (SUGAR, CHOCOLATE LIQUOR, COCOA BUTTER, DEXTROSE, SOY LECITHIN, VANILLA), TOPPING (SKIM MILK, HYDROGENATED COCONUT AND PALM KERNEL OIL, WATER, SUGAR, CORN SYRUP, CONTAINS LESS THAN 2% OF THE FOLLOWING: SORBITAN MONOSTEARATE, NATURAL AND ARTIFICIAL FLAVOR, POLYSORBATE 80, POLYSORBATE 60, CARRAGEENAN, SOY LECITHIN, SODIUM HEXAMETAPHOSPHATE COLORED WITH ANNATTO), DARK CHOCOLATE SHAVINGS (SUGAR, CHOCOLATE LIQUEUR, COCOA BUTTER, BUTTER OIL [MILK], EMULSIFIER: SOY LECITHIN, NATURAL VANILLA), FUDGE BASE (NATURAL & DUTCH PROCESS COCOAS, FULLY & NON HYDROGENATED VEGETABLE OIL, CORN SYRUP SOLIDS, LECITHIN, NATURAL & ARTIFICIAL FLAVOR, CHOCOLATE LIQUOR, SALT), MARGARINE (PALM OIL, SOYBEAN OIL, CULTURED SKIM MILK, SKIM MILK, SALT, MONO-DIGLYCERIDES, SOY LECITHIN, VITAMIN A, PALMITATE, COLORED WITH BETA CAROTENE [SOURCE OF VITAMIN A], NATURAL AND ARTIFICIAL FLAVOR), CORN SYRUP, NATURAL AND ARTIFICIAL FLAVORS, SALT