Which food has less impact on blood sugar?

CAKE- SUGAR, ENRICHED BLEACHED FLOUR (BLEACHED WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID), WATER, SOYBEAN OIL, EGGS, EGG WHITES, MODIFIED CORN STARCH. CONTAINS 2% OR LESS OF NONFAT MILK, SALT, LEAVENING (SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, MONOCALCIUM PHOSPHATE), VITAL WHEAT GLUTEN, SORBITAN MONOSTEARATE, MONO AND DIGLYCERIDES, POLYSORBATE 60, SODIUM STEAROYL LACTYLATE, ARTIFICIAL AND NATURAL FLAVORS, SOY LECITHIN. ICING AND GARNISH- SUGAR, VEGETABLE SHORTENING [INTERESTERIFIED SOYBEAN OIL, PALM KERNEL OIL, PALM OIL, CANOLA OIL, SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60, TBHQ (PRESERVATIVES)], CORN SYRUP, GLUCOSE SYRUP (WHEAT OR CORN), WATER, COCOA PROCESSED WITH ALKALI. CONTAINS LESS THAN 2% OF SALT, RICE FLOUR, CITRIC ACID, CORNSTARCH, MALTODEXTRIN, HIGH FRUCTOSE CORN SYRUP, INVERT SUGAR, GLYCERIN, GUM ARABIC, LOCUST BEAN GUM, XANTHAN GUM, CARRAGEENAN, GUAR GUM, ACACIA GUM, PHOSPHORIC ACID, NATURAL AND ARTIFICIAL FLAVOR, CARAMEL COLOR, POLYSORBATE 80, DEXTROSE, TITANIUM DIOXIDE (FOR COLOR), SODIUM BENZOATE, POTASSIUM SORBATE (PRESERVATIVES), DECORATED CAKES MAY CONTAIN-BLUE 1, BLUE 1 LAKE, YELLOW 5, YELLOW 5 LAKE, YELLOW 6, YELLOW 6 LAKE, RED 40, RED 40 LAKE, RED 3, BLUE 2 LAKE, INDIGO CARMINE E132.