Which food has less impact on blood sugar?

CAKE: SUGAR, ENRICHED BLEACHED FLOUR (BLEACHED WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), WATER, SOYBEAN OIL, EGGS, EGG WHITES, MODIFIED CORN STARCH. CONTAINS 2% OR LESS OF: NONFAT MILK, SALT, LEAVENING (SODIUM ACID PYROPHOSPHATE, BAKING SODA, CORN STARCH, MONOCALCIUM PHOSPHATE), VITAL WHEAT GLUTEN, EMULSIFIERS (SORBITAN MONOSTEARATE, MONO- AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, SOY LECITHIN), DEXTROSE, ARTIFICIAL AND NATURAL FLAVORS, CARAMEL COLOR. ICING: SUGAR, VEGETABLE SHORTENING (INTERESTERIFIED SOYBEAN OIL, SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60), WATER, CORN SYRUP. CONTAINS 2% OR LESS OF: SALT, DEXTROSE, HIGH FRUCTOSE CORN SYRUP, MODIFIED CORN STARCH, NATURAL AND ARTIFICIAL FLAVORS, SORBITAN MONOSTEARATE, MONO- AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, CORN CEREAL, PALM OIL, YELLOW 5, BLUE 1, YELLOW 5 ALUMINUM LAKE), LOCUST BEAN GUM, CITRIC ACID. TOPPING: PECANS, SUGAR, CORN SYRUP, SWEETENED CONDENSED SKIM MILK (SKIM MILK, SUGAR), WATER, PALM OIL, WHEY, HEAVY CREAM. CONTAINS 2% OR LESS OF: CITRIC ACID, DISODIUM PHOSPHATE, MONO- AND DIGLYCERIDES, NATURAL AND ARTIFICIAL FLAVOR, NONFAT MILK, PECTIN, PROPYLENE GLYCOL ALGINATE, SULFITES.