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, BAKING SODA, 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: WHITE CHOCOLATE (SUGAR, COCOA BUTTER, WHOLE MILK POWDER, WHEY POWDER, LACTOSE, SOY LECITHIN, PGPR, VANILLA, HYDROGENATED PALM KERNEL OIL, SKIM MILK POWDER, MONOGLYCERIDES, ARTIFICIAL FLAVOR), COLORS (RED 40, YELLOW 5, YELLOW 6, BLUE 1, BLUE 2, TITANIUM DIOXIDE). CURLS: COCOA CONFECTIONARY (SUGAR, COCOA BUTTER, WHOLE MILK POWDER, LACTOSE, WHEY POWDER, SOY LECITHIN, NATURAL VANILLA), COLOR (RED 40, BLUE 1, CARROT EXTRACT).