Which food has less impact on blood sugar?

RED VELVET CAKE (SUGAR, ENRICHED FLOUR BLEACHED [WHEAT FLOUR, NIACIN, IRON, THIAMIN MONONITRATE, RIBOFLAVIN, FOLIC ACID], FOOD STARCH-MODIFIED, EGG WHITE, SOYBEAN OIL, PALM OIL, CONTAINS 2% OR LESS OF: LEAVENING [BAKING SODA, SODIUM ALUMINUM PHOSPHATE, MONOCALCIUM PHOSPHATE], MONO- AND DIGLYCERIDES, EGG YOLK WITH SODIUM SILICOALUMINATE, MODIFIED TAPIOCA STARCH, DEXTROSE, COCOA PROCESSED WITH ALKALI, NATURAL AND ARTIFICIAL FLAVOR, PROPYLENE GLYCOL MONO AND DIESTERS OF FATTY ACIDS, SALT, SODIUM STEAROYL LACTYLATE, VITAL WHEAT GLUTEN, WHEY, SORBITAN MONOSTEARATE, NONFAT MILK, DICALCIUM PHOSPHATE, TETRASODIUM PYROPHOSPHATE, XANTHAN GUM, POLYSORBATE 60, MONO AND DIGLYCERIDES, CALCIUM ACETATE, GUAR GUM, RED 40, CELLULOSE GUM, SOY FLOUR.), CONFECTIONER'S SUGAR (SUGAR, CORNSTARCH), WATER, VEGETABLE SHORTENING (SOYBEAN OIL, HYDROGENATED SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60, TBHQ AND CITRIC ACID ADDED TO HELP PRESERVE FRESHNESS.), SOYBEAN OIL, EGGS, CREAM CHEESE (PASTEURIZED MILK AND CREAM, CHEESE CULTURE, SALT, GUAR GUM, CAROB BEAN GUM, XANTHAN GUM), BUTTER (CREAM, NATURAL FLAVORING), NATURAL AND ARTIFICIAL FLAVORS