Which food has less impact on blood sugar?

CAKE: SUGAR, BLEACHED ENRICHED FLOUR (BLEACHED WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), WATER, SOYBEAN OIL, EGGS, EGG WHITES, COCOA PROCESSED WITH ALKALI, MODIFIED CORN STARCH. CONTAINS 2% OR LESS OF: NONFAT MILK, LEAVENING (SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, CORN STARCH, MONOCALCIUM PHOSPHATE), SALT, XANTHAN GUM, VITAL WHEAT GLUTEN, EMULSIFIERS (SORBITAN MONOSTEARATE, MONO- AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, SOY LECITHIN), DEXTROSE, NATURAL AND ARTIFICIAL FLAVORS, RED 40 LAKE, BLUE 1 LAKE, YELLOW 5 LAKE. ICING: SUGAR, VEGETABLE SHORTENING (PARTIALLY HYDROGENATED SOYBEAN AND COTTONSEED OILS, MONO- AND DIGLYCERIDES, POLYSORBATE 60), WATER, CORN SYRUP. CONTAINS 2% OR LESS OF: TITANIUM DIOXIDE (FOR COLOR), SALT, DEXTROSE, CORN STARCH, NATURAL AND ARTIFICIAL FLAVORS. DISC: SEMISWEET CHOCOLATE (CHOCOLATE LIQUOR, SUGAR, COCOA BUTTER, BUTTER OIL [MILK], SOY LECITHIN, PGPR, NATURAL VANILLA, COCONUT OIL), COLORS (TITANIUM DIOXIDE, YELLOW 5, YELLOW 6, RED 40, BLUE 1, BLUE 2), SKIM MILK POWDER. CURLS: SUGAR, COCOA BUTTER, WHOLE MILK POWDER, LACTOSE, WHEY POWDER, SOY LECITHIN, NATURAL VANILLA, COLOR (RED 40, BLUE 1, CARROT EXTRACT).