Which food has less impact on blood sugar?

CAKE [SUGAR, BLEACHED ENRICHED WHEAT FLOUR (FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), WATER, EGGS, SOYBEAN OIL, VEGETABLE SHORTENING (PALM OIL, MONO AND DIGLYCERIDES, POLYSORBATE 60), 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, SODIUM BICARBONATE, SORBITAN MONOSTEARATE, POLYSORBATE 60, PROPYLENE GLYCOL MONOESTERS, MONO AND DIGLYCERIDES, DATEM, BETA CAROTENE, SOY LECITHIN, ARTIFICIAL FLAVOR, YELLOW 5, GUM ARABIC, CITRIC ACID, XANTHAN GUM, PHOSPHORIC ACID], ICING [SUGAR, VEGETABLE SHORTENING (PALM OIL, MONO AND DIGLYCERIDES, POLYSORBATE 60), WATER, COCOA (PROCESSED WITH ALKALI), CORN SYRUP, GLYCERIN, CORN STARCH, FOOD STARCH-MODIFIED, GUAR GUM, NATURAL AND ARTIFICIAL VANILLA AND BUTTER FLAVORS, 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, ARTIFICIAL FLAVOR, SOY LECITHIN, GUM ARABIC, COCOA (PROCESSED WITH ALKALI), FD&C BLUE 1, RED 3, YELLOW 5, YELLOW 6, RED 40, CONFECTIONERS GLAZE, POLYSORBATE 60]