Which food has less impact on blood sugar?

BLUEBERRY FILLING (SUGAR, WATER, BLUEBERRIES, MODIFIED FOOD STARCH, GLYCERIN, CONTAINS 2% OR LESS OF THE FOLLOWING: CITRIC ACID, MICROCRYSTALLINE CELLULOSE, SODIUM CITRATE, NATURAL FLAVOR, SODIUM BENZOATE [PRESERVATIVE), RED 40, BLUE 1), ENRICHED WHEAT FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), MARGARINE (PALM OIL, SOYBEAN OIL, WATER, SALT, CONTAINS LESS THAN 2% OF: MONO- AND DIGLYCERIDES, SOY LECITHIN, SODIUM BENZOATE [A PRESERVATIVE], CITRIC ACID, NATURAL AND ARTIFICIAL FLAVOR, VITAMIN A PALMITATE, BETA-CAROTENE [COLOR], VITAMIN D3, WHEY), SUGAR, WATER, NEUFCHATEL CHEESE (CULTURED PASTEURIZED MILK AND CREAM, SALT, CAROB BEAN GUM), EGG, NONFAT MILK, CONTAINS 2% OR LESS OF: EGG WHITES, CORN SYRUP, PALM OIL, YEAST, BROWN SUGAR, MODIFIED FOOD STARCH, MONOGLYCERIDES, SALT, GLYCERIN, BUTTER (PASTEURIZED CREAM, NATURAL FLAVORINGS), VITAL WHEAT GLUTEN, SODIUM STEAROYL LACTYLATE, NATURAL AND ARTIFICIAL FLAVOR, LEMON JUICE CONCENTRATE, CALCIUM SULFATE, CALCIUM CARBONATE, APRICOT PUREE, LACTIC ACID, CREAM OF TARTAR, POTASSIUM SORBATE (PRESERVATIVE), WHEY, CALCIUM LACTATE, DEXTROSE, AGAR, XANTHAN GUM, PECTIN, SORBIC ACID, ASCORBIC ACID, SOY LECITHIN, ENZYMES, TITANIUM DIOXIDE (FOR COLOR), SODIUM BENZOATE (PRESERVATIVE), CITRIC ACID, TURMERIC EXTRACT (COLOR), ANNATTO EXTRACT (COLOR).