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 (INTERESTERIFIED SOYBEAN, SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60), WATER, CORN SYRUP. CONTAINS 2% OR LESS OF: TITANIUM DIOXIDE (FOR COLOR), SALT, DEXTROSE, MODIFIED CORN STARCH, NATURAL AND ARTIFICIAL FLAVORS, SORBITAN MONOSTEARATE, MONO- AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), COCOA PROCESSED WITH ALKALI, SOYBEAN AND/OR PALM OILS, HIGH FRUCTOSE CORN SYRUP, CHOCOLATE LIQUOR, CORN FLOUR, BAKING SODA, SOY LECITHIN, MALTODEXTRIN. TOPPING: UNBLEACHED, ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), SUGAR, PALM AND/OR CANOLA OIL, COCOA PROCESSED WITH ALKALI, HIGH FRUCTOSE CORN SYRUP, LEAVENING (BAKING SODA, CALCIUM PHOSPHATE), CORN STARCH, SALT, SOY LECITHIN, VANILLIN, CHOCOLATE.