Which food has less impact on blood sugar?

BLUEBERRY - BLUEBERRY MUFFINS (SUGAR, BLEACHED ENRICHED WHEAT FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], SOYBEAN AND/OR CANOLA OIL, WATER, BLUEBERRIES, EGGS, BUTTERMILK [SKIM MILK, DRY BUTTERMILK, SALT, BACTERIAL CULTURE], DRIED BLUEBERRIES [BLUEBERRIES, SUGAR], WHEY [MILK], LEAVENING [SODIUM BICARBONATE, SODIUM ACID PYROPHOSPHATE, MONOCALCIUM PHOSPHATE], NATURAL AND ARTIFICIAL FLAVOR, FOOD STARCH-MODIFIED, SODIUM STEAROYL LACTYLATE, ENZYME, MONO- AND DIGLYCERIDES, XANTHAN GUM, SALT, POLYGLYCEROL ESTERS OF FATTY ACIDS, CELLULOSE GUM, SOY LECITHIN), CHOCOLATE CHIP - CHOCOLATE CHIP MUFFINS (SUGAR, ENRICHED WHEAT FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], SOY BEAN AND/OR CANOLA OIL, SEMISWEET CHOCOLATE CHIPS [SUGAR, CHOCOLATE LIQUOR, COCOA BUTTER, DEXTROSE, SOY LECITHIN, SALT, NATURAL FLAVOR], WATER, EGGS, BUTTERMILK [SKIM MILK, DRY BUTTERMILK, SALT, BACTERIAL CULTURE], FOOD STARCH-MODIFIED, WHEY [MILK], LEAVENING [SODIUM ACID PYROPHOSPHATE, SODIUM BICARBONATE, MONOCALCIUM PHOSPHATE], ARTIFICIAL FLAVOR, SALT, SODIUM STEAROYL LACTYLATE, POLYGLYCEROL ESTERS OF FATTY ACIDS, XANTHAN GUM, ENZYME, CELLULOSE GUM, BETA-CAROTENE [COLOR])