Which food has less impact on blood sugar?

CAKE [SUGAR, WATER, BLEACHED ENRICHED WHEAT FLOUR (FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), SOYBEAN OIL, EGGS, COCOA (PROCESSED WITH ALKALI), VEGETABLE SHORTENING (PALM OIL, DISTILLED MONOGLYCERIDES, POLYSORBATE 60, CITRIC ACID), CORN SYRUP, FOOD STARCH-MODIFIED, WHEY, VITAL WHEAT GLUTEN, SALT, SODIUM ALUMINUM PHOSPHATE, DEXTROSE, TITANIUM DIOXIDE, SODIUM PROPIONATE AND POTASSIUM SORBATE (PRESERVATIVES), OLEYL LACTYLIC ACID, SOY LECITHIN, SODIUM BICARBONATE, BAKING POWDER (SODIUM BICARBONATE, SODIUM ACID PYROPHOSPHATE, CORN STARCH, MONOCALCIUM PHOSPHATE), NATURAL AND ARTIFICIAL FLAVOR, SORBITAN MONOSTEARATE, POLYSORBATE 60, PROPYLENE GLYCOL MONOESTERS, MONO AND DIGLYCERIDES, DATEM, BETA CAROTENE, CARBOXYMETHYLCELLULOSE, COLORS (ANNATTO EXTRACT, TURMERIC), YELLOW 5, GUM ARABIC, CITRIC ACID, XANTHAN GUM, PHOSPHORIC ACID], ICING [SUGAR, VEGETABLE SHORTENING (PALM OIL, DISTILLED MONOGLYCERIDES, POLYSORBATE 60, CITRIC ACID), WATER, COCOA (PROCESSED WITH ALKALI), CORN SYRUP, GLYCERIN, CORN STARCH, FOOD STARCH-MODIFIED, GUAR GUM, NATURAL AND ARTIFICIAL FLAVOR, SALT, SORBITAN MONOSTEARATE, POLYSORBATE 60, MONOGLYCERIDES, PHOSPHORIC ACID, SODIUM PROPIONATE AND POTASSIUM SORBATE (PRESERVATIVES), GUM ARABIC, CITRIC ACID XANTHAN GUM, YELLOW 5, YELLOW 6, RED 40, GREEN 3, BLUE 1, RED 3], TOPPINGS: [SUGAR, MODIFIED CORN STARCH, PALM KERNEL OIL, CORN STARCH, GLUCOSE POWDER, COCOA POWDER, SOY LECITHIN, ARTIFICIAL FLAVOR, GUM ARABIC, FD&C BLUE 1, RED 3, YELLOW 5, YELLOW 6, RED 40, GREEN 3, SALT, SUGAR GLAZE, POLYSORBATE 60, ENZYMES]