Which food has less impact on blood sugar?

VANILLA CREME CAKE (SUGAR, ENRICHED WHEAT FLOUR BLEACHED (FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), FOOD STARCH-MODIFIED, SOYBEAN OIL, CONTAINS 2% OR LESS OF: DEFATTED SOY FLOUR, EGGS, LEAVENING (BAKING SODA, SODIUM ALUMINUM PHOSPHATE), MONO- AND DIGLYCERIDES, NATURAL AND ARTIFICIAL FLAVOR, PROPYLENE GLYCOL MONO- AND DIESTERS OF FATTY ACIDS, SALT, SODIUM STEAROYL LACTYLATE, VITAL WHEAT GLUTEN, WHEY.) (EGG, MILK, SOYBEANS, WHEAT), CONFECTIONER'S SUGAR (SUGAR, CORNSTARCH), VEGETABLE SHORTENING (SOYBEAN OIL, HYDROGENATED SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60, TBHG AND CITRIC ACID ADDED TO HELP PRESERVE FRESHNESS.) (SOYBEANS), EGGS SPRINKLES (SUGAR, CORNSTARCH, HYDROGENATED PALM KERNEL OIL, SOYA LECITHIN, GUM ARABIC, CONFECTIONER'S GLAZE), GUM TRAGACANTH, PROPYLENE GLYCOL, XANTHAN GUM, CITRIC ACID SOLUTION, SODA BENZOATE, WATER, ORANGE EMULSION (GUM TRAGACANTH, PROPYLENE GLYCOL, XANTHAN GUM, CITRIC ACID SOLUTION, SODA BENZOATE, WATER), BUTTER FLAVOR (VEGETABLE OILS, MILK DERIVATIVES, VEGETABLE GUMS, EGG DERIVATIVES, AROMATIC CHEMICALS, ALCOHOL, ALDEHYDES AND ESTERS), NATURAL AND ARTIFICIAL FLAVORS (WATER, PROPYLENE GLYCOL USP, BENZODIHYDROPYRONE, INVERT SUGAR)