Which food has less impact on blood sugar?

RED VELVET CAKE BASE (SUGAR, BLEACHED ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), COCOA [PROCESSED WITH ALKALI], DRIED EGG WHITES, PALM OIL, EMULSIFIER BLEND [PROPYLENE GLYCOL MONOESTERS, MONO- AND DIGLYCERIDES, SOY LECITHIN, BHT, CITRIC ACID], LEAVENING [SODIUM BICARBONATE, SODIUM ALUMINUM PHOSPHATE, MONOCALCIUM PHOSPHATE], CONTAINS 2% OR LESS OF THE FOLLOWING: NONFAT DRY MILK, DRIED EGG YOLKS, MODIFIED FOOD STARCH, DEXTROSE, SALT, MONO- AND DIGLYCERIDES, ARTIFICIAL FLAVOR, POLYSORBATE 60, TETRASODIUM PYROPHOSPHATE, GUM ARABIC, SODIUM PROPIONATE (PRESERVATIVE), CALCIUM ACETATE, SOY LECITHIN, GUAR GUM, XANTHAN GUM, POTASSIUM SORBATE [PRESERVATIVE], RED 40), WATER, CREAM CHEESE FILLING (CREAM CHEESE [CREAM, SKIM MILK, LACTIC ACIDS, SALT, XANTHAN, LOCUST BEAN, AND GUAR GUMS], SUGAR, SORBITOL, WATER, DEXTROSE, CORN SYRUP, EGGS, GLYCEROL, MODIFIED FOOD STARCH, CONTAINS 2% OR LESS OF THE FOLLOWING: NONFAT DRY MILK, CELLULOSE GEL AND GUM, SALT, LACTIC ACID, NATURAL FLAVOR, MONOGLYCERIDES, POTASSIUM SORBATE [PRESERVATIVE], TITANIUM DIOXIDE (FOR COLOR), WHITE COATING (SUGAR, PALM KERNEL OIL, SKIMMED MILK POWDER, SUNFLOWER LECITHIN, NATURAL VANILLA FLAVOR), SOYBEAN OIL.