Which food has less impact on blood sugar?

WHITE COMPOUND (SUGAR, PALM KERNEL OIL, NONFAT DRY MILK, DRY WHOLE MILK, WHEY, PALM OIL, SOY LECITHIN [AN EMULSIFIER], NATURAL VANILLA FLAVOR), CAKE BASE (SUGAR, BLEACHED WHEAT FLOUR, FOOD STARCH-MODIFIED, SOYBEAN OIL, LEAVENING [BAKING SODA, SODIUM ALUMINUM PHOSPHATE, MONOCALCIUM PHOSPHATE], NATURAL AND ARTIFICIAL FLAVOR, WHEY, SOY FLOUR, SALT, VITAL WHEAT GLUTEN, PROPYLENE GLYCOL MONOESTERS [AN EMULSIFIER], MONOGLYCERIDES [AN EMULSIFIER], SODIUM STEAROYL LACTYLATE [AN EMULSIFIER]), SOYBEAN OIL, WATER, TOPPING (WATER, HYDROGENATED PALM KERNEL OIL, SUGAR; CORN SYRUP, CONTAINS 2% OR LESS OF POLYSORBATE 60, HYDROXYPROPYL METHYLCELLULOSE, ARTIFICIAL FLAVOR, SALT, SODIUM STEAROYL LACTYLATE, SORBITAN MONOSTEARATE, SODIUM CITRATE, SOY LECITHIN, XANTHAN GUM, ANNATTO EXTRACT [COLOR]), EGG, SUGAR, SOUR CREAM (CULTURED PASTEURIZED CREAM, NONFAT MILK, ENZYMES), CONTAINS 2% OR LESS OF THE FOLLOWING: MILK, HEAVY CREAM, STRAWBERRY FILLING (STRAWBERRY, SUGAR, WATER, DEXTROSE, CONTAINS 2% OR LESS OF CITRIC ACID [PRESERVATIVE], PECTIN, AMMONIUM ALGINATE, CALCIUM ALGINATE, ARTIFICIAL FLAVOR, SODIUM BENZOATE, MONO- AND DIGLYCERIDES, FD&C RED #40), CREME BASE (MODIFIED TAPIOCA STARCH, CALCIUM CARBONATE, CORN STARCH, SALT, CONTAINS 2% OR LESS OF WHEY, SKIM MILK, CARRAGEENAN, GLUCONO DELTA-LACTONE, XANTHAN GUM, POTASSIUM SORBATE [PRESERVATIVE], SOY LECITHIN, FD&C YELLOW #5, FD&C YELLOW #6), STABILIZER BLEND (SUGAR, MODIFIED CORN STARCH, GUM ARABIC, NATURAL AND ARTIFICIAL FLAVORS), PALM OIL, BUTTER (CREAM, NATURAL FLAVORING), NATURAL AND ARTIFICIAL FLAVOR, ARTIFICIAL FLAVOR, ARTIFICIAL COLOR, FD&C RED #40.