Which food has less impact on blood sugar?

CAKE BASE (SUGAR, ENRICHED WHEAT FLOUR BLEACHED [FLOUR, NIACIN, REDUCED IRON, FERROUS SULFATE, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], FOOD STARCH-MODIFIED, SOYBEAN OIL, DRY WHEY, LEAVENING [SODIUM ALUMINUM PHOSPHATE, BAKING SODA], SALT, VITAL WHEAT GLUTEN, PROPYLENE GLYCOL MONO & DIESTERS OF FATTY ACIDS, MONO & DIGLYCERIDES, SODIUM STEAROYL LACTYLATE, DEXTROSE, CORN STARCH, TRICALCIUM PHOSPHATE, NATURAL AND ARTIFICIAL FLAVOR, WATER, CITRIC ACID, ALPHA TOCOPHEROL [AS PRESERVATIVE], ASCORBIC ACID [DOUGH CONDITIONER], EGG, SOY FLOUR), WHITE WAFER (SUGAR, VEGETABLE OIL [PALM KERNEL OIL AND HYDROGENATED PALM KERNEL OIL], WHEY POWDER, WHOLE MILK SOLIDS, NONFAT DRY MILK SOLIDS, SOY LECITHIN [AN EMULSIFIER], SALT, AND ARTIFICIAL FLAVOR), SOY OIL, WATER, WHOLE EGGS, NONPAREILS (SUGAR, CORNSTARCH, CONFECTIONER'S GLAZE, FD&C YELLOW #5, FD&C RED #3, FD&C BLUE #1, CARNAUBA WAX, FD&C RED #40, FD&C YELLOW #6, FD&C BLUE #2), SPRINKLES (SUGAR, VEGETABLE OILS [PARTIALLY HYDROGENATED COTTONSEED OIL OR SOYBEAN OIL], CORN STARCH, CORN SYRUP, SOY LECITHIN, SALT, NATURAL AND ARTIFICIAL FLAVOR, CONFECTIONER'S GLAZE, CARNAUBA WAX, FD&C RED 40, FD&C YELLOW 5, FD&C, YELLOW 6, FD&C BLUE 1, AND FD&C ) CORN SYRUP, VINEGAR, NATURAL AND ARTIFICIAL FLAVOR, POTASSIUM SORBATE (PRESERVATIVE), ENZYME (WHEAT FLOUR AND 2% OR LESS OF EACH OF THE FOLLOWING: SALT, ENZYMES)