Which food has less impact on blood sugar?

FROSTING ((SUGAR, VEGETABLE SHORTENING (PALM OIL, CANOLA OIL, MONOAND DIGLYCERIDES), WATER, CORN SYRUP.CONTAINS 2% OR LESS OF EACH OF THE FOLLOWING:HIGH FRUCTOSE CORN SYRUP, CORN STARCH, BLUE 1, NATURAL AND ARTIFICIAL FLAVOR, SALT, GUAR GUM, PHOSPHORIC ACID, POTASSIUM SORBATE (PRESERVATIVE), POLYSORBATE 60, SODIUM BENZOATE(PRESERVATIVE))., WATER, GLYCERINE, SUGAR, FD&C YELLOW #6 , FD&C RED #40, MODIFIED CORN STARCH, FD&C BLUE #1, CARRAGEENAN, POTASSIUM SORBATE (PRESERVATIVE), XANTHAN GUM, CITRIC ACID, MALTODEXTRIN, DEXTROSE.), CAKE (SUGAR, BLEACHED ENRICHED FLOUR(WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), COCOA(PROCESSED WITH ALKALI), VEGETABLE SHORTENING (SOYBEAN OIL, VEGETABLE MONO- AND DIGLYCERIDES, PROPYLENE GLYCOL ESTERS, TOCOPHEROLS, VITAMIN C PALMITATE), DRIED EGG WHITES, LEAVENING (SODIUM BICARBONATE, SODIUM ALUMINUM PHOSPHATE, SODIUM ACID PYROPHOSPHATE, MONOCALCIUM PHOSPHATE).CONTAINS 2% OR LESS OF EACH OF THE FOLLOWING DRIED EGG YOLKS, FOOD STARCH-MODIFIED, NONFAT DRY MILK, WHEY PROTEIN CONCENTRATE (MILK), EMULSIFIER(PROPYLENE GLYCOL ESTERS, MONO-AND DIGLYCERIDES, SODIUM STEAROYL LACTYLATE), NATURAL AND ARTIFICIAL FLAVOR, SOYBEAN OIL, SALT, CELLULOSE GUM, POLYSORBATE 60, GUAR GUM, SODIUM STEAROYL LACTYLATE, XANTHAN GUM, RED 40, SOY FLOUR)SOYBEAN OI