Which food has less impact on blood sugar?

DOUGH: WATER, ENRICHED WHEAT FLOUR (WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), MARGARINE (PALM OIL, PALM KERNEL OIL, WATER, SALT, EMULSIFIERS [SOY-LECITHIN, DISTILLED MONOGLYCERIDES], BUTTER FLAVOR, CITRIC ACID, ANTIOXIDANT [SOY-DERIVED], VITAMIN A, COLOR [BETA-CAROTENE]), GRANULATED SUGAR, ROLL BASE (DEXTROSE, WHEY [MILK], MONOGLYCERIDES, SALT, SOYBEAN OIL, DEFATTED SOY FLOUR, NATURAL & ARTIFICIAL FLAVOR, GUAR GUM, CALCIUM PROPIONATE [FOR FRESHNESS], 2% OR LESS OF EACH OF THE FOLLOWING: SODIUM STEAROYL LACTYLATE [SSL], SODIUM ACID PYROPHOSPHATE, WHEAT GLUTEN, BAKING SODA, AMMONIUM SULFATE, XANTHAN GUM, EGGS, CALCIUM SULFATE, ENZYMES [WHEAT], ASCORBIC ACID, AZODICARBONAMIDE [ADA], BETA CAROTENE [COLOR]), PALM FLAKES (PALM OIL & PALM KERNEL OIL), YEAST (YEAST, SORBITAN MONOSTEARATE), WHOLE EGG POWDER (WHOLE EGGS, SODIUM SILICOALUMINATE), BUTTER VANILLA FLAVOR (DEXTROSE, CORN STARCH, WATER, SILICON DIOXIDE, ETHYL ALCOHOL, TURMERIC EXTRACT, APO CAROTENAL, VITAMIN E), SOYBEAN OIL. FILLING: SUGAR, WHEAT FLOUR, CINNAMON, COTTONSEED FIBER, 2% OR LESS OF EACH OF THE FOLLOWING: MODIFIED CORN STARCH, COCOA (PROCESSED WITH ALKALI), SALT, CARBOXYMETHYLCELLULOSE, CARAMEL COLOR, MALTODEXTRIN, WATER. ICING: POWDERED SUGAR (SUGAR, CORN STARCH), WATER, SUGAR, SOYBEAN OIL, HYDROGENATED VEGETABLE OIL (SOYBEAN OIL, PALM OIL & PALM KERNEL OIL), STABILIZERS (CALCIUM CARBONATE, DEXTROSE, AGAR, TITANIUM DIOXIDE [COLOR], SALT, MONOGLYCERIDES), BUTTER VANILLA FLAVOR (DEXTROSE, CORN STARCH, WATER, SILICON DIOXIDE, ETHYL ALCOHOL, TURMERIC EXTRACT, APO CAROTENAL, VITAMIN E).