Which food has less impact on blood sugar?

PASTRY TOPPING (WATER, HYDROGENATED PALM KERNEL OIL, SUGAR, CORN SYRUP, CONTAINS LESS THAN 2% OF THE FOLLOWING: PROPYLENE GLYCOL, POLYSORBATE 60, NATURAL AND ARTIFICIAL FLAVOR, CARBOHYDRATE GUM, SODIUM STEAROYL, LACTYLATE, SORBITAN MONOSTEARATE, NATURAL FLAVOR (CONTAINS MILK AND SOY INGREDIENTS), SOY LECITHIN, SALT, SODIUM CITRATE, XANTHAN GUM, COLORED WITH (ANNATTO)), SUGAR, WATER, EGG WHITES (FRESH EGG WHITES, SODIUM CURATE, TRIETHYL CITRATE AND XANTHAN GUM AS A WHIPPING AGENT), WHEAT FLOUR (BLEACHED WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACD), EGG (WHOLE EGGS, EGG YOLKS, CORN SYRUP, SALT), CANOLA OIL, CAKE BASE (COCOA (PROCESSED WITH ALKALI), BLEACHED ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACD), LEAVENING (SODIUM BICARBONATE, SODIUM ACID PYROPHOSPHATE, CORN STARCH, MONOCALCIUM PHOSPHATE), SALT, SOYBEAN OIL, CONTAINS 2% OR LESS OF EACH OF THE FOLLOWING: CALCIUM SILICATE (ANTI-CAKING AGENT, NONFAT DRY MILK, ARTIFICIAL FLAVOR, DRIED EGG WHITES, SOY FLOUR), COCONUT CREAM (FRESH COCONUT EXTRACT, WATER AND STABILIZERS XANTHAN GUM E415, GUAR GUM E412, CARRAGEENAN E407)), FOOD STARCH - MODIFIED, SHORTENING (PALM OIL AND SOYBEAN OIL WITH MONO- AND DIGLYCERIDES AND POLYSORBATE 60 ADDED. TBHQ AND CITRIC ACID ADDED TO HELP PROTECT FLAVOR), FUDGE POWDER (COCOA (PROCESSED WITH ALKALI), SUGAR, SOYBEAN OIL, NATURAL COCOA CONTAINS 2% OR LESS OF EACH OF THE FOLLOWING SALT, SOY LECITHIN, CORN STARCH, CREAM OF TARTAR, WHEAT FLOUR, EGG WHITES, WHEY (MILK)), CORN SYRUP, UNSALTED BUTTER (PASTEURIZED CREAM NATURAL FLAVORS (LACTIC ACID, STARTER DISTILLATE)), BUTTER BLEND (PALM OIL, BUTTER (CREAM, SALT), WATER, SOYBEAN OIL, CONTAINS LESS THAN 2% OF SALT, NONFAT DRY MILK, SOY LECITHIN, POTASSIUM SORBATE PRESERVATIE), VEGETABLE MONO & DIGLYCERIDES NATURAL & ARTIFICIAL FLAVORS, BETA CAROTENE (COLOR), VITAMIN A PALMITATE ADDED), NONFAT DRY MILK, CREAM OF TARTAR (CALCIUM SULFATE, MONOCALCIUM PHOSPHATE