Which food has less impact on blood sugar?

CAKE: SUGAR, ENRICHED BLEACHED FLOUR (BLEACHED WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC G) ACID), WATER, SOYBEAN OIL, EGGS EGG WHITES, MODIFIED CORN STARCH. CONTAINS 2% OR LESS OF: NONFAT MILK, SALT, LEAVENING (SODIUM ACID PYROPHOSPHATE, BAKING SODA, CORN STARCH, MONOCALCIUM PHOSPHATE) , VITAL WHEAT GLUTEN, EMULSIFIERS (SORBITAN MONOSTEARATE, MONO-AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, SOY LECITHIN), DEXTROSE, ARTIFICIAL AND NATURAL FLAVORS, PALM OIL, GUM ACACIA, XANTHAN GUM, TITANIUM DIOXIDE (FOR COLOR), RED 3, BLUE 1, YELLOW 5, YELLOW 6, BLUE 1 LAKE. ICING: SUGAR, VEGETABLE SHORTENING (INTERESTERIFIED SOYBEAN OIL, SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES POLYSORBATE 60). WATER, CORN SYRUP. CONTAINS 2% OR LESS OF SALT, DEXTROSE, HIGH FRUCTOSE CORN SYRUP, MODIFIED CORN STARCH, NATURAL SORBITAN MONOSTEARATE, MONO AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, CORN CEREAL, PALM OIL, YELLOW 6. RED 40, BLUE 1, YELLOW 5. TOPPING: SUGAR, VEGETABLE OIL (PALM, PALM KERNEL), MODIFIED CORN STARCH, CONFECTIONERS GLAZE, DEXTRIN, RED 40 LAKE, YELLOW 6 LAKE, BLUE 1 LAKE, RED 3, BLUE 1, YELLOW 5 LAKE NATURAL AND ARTIFICIAL FLAVOR, SOY LECITHIN, CARNAUBA WAX.