Which food has less impact on blood sugar?

STRAWBERRY FILLING (WATER, SUGAR, STRAWBERRY PUREE, CORN SYRUP, MODIFIED FOOD STARCH, CONTAINS 20% OR LESS OF CITRIC ACID, NATURAL AND ARTIFICIAL FLAVOR, SALT, POTASSIUM SORBATE (PRESERVATIVE), SODIUM BENZOATE (PRESERVATIVE), CELLULOSE GUM, SODIUM ALGINATE, RED #40), VANILLA CAKE(SUGAR, ENRICHED WHEAT FLOUR BLEACHED (FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), FOOD STARCH-MODIFIED, SOYBEAN OIL, CONTAINS 296 OR LESS OF DEFATTED SOY FLOUR, EGGS, LEAVENING (BAKING SODA SODIUM ALUMINUM PHOSPHATE), MONO- AND DIGLYCERIDES, NATURAL AND ARTIFICIAL FLAVOR, PROPYLENE GLYCOL MONO- AND DIESTERS OF FATTY ACIDS, SALT, SODIUM STEAROYL LACTYLATE, VITAL WHEAT GLUTEN, WHEY.), CONFECTIONER'S SUGAR (SUGAR, CORNSTARCH). VEGETABLE SHORTENING (SOYBEAN OIL, HYDROGENATED SOYBEAN OIL, HYDROGENATED COTTON SEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60, BHA AND CITRIC ACID ADDED TO HELP PRESERVE FRESHNESS.), EGGS, SOYBEAN OIL, WATER, BUTTER (CREAM, NATURAL FLAVORING), PINK COLOR (WATER, HIGH FRUCTOSE CORN SYRUP, GLYCERINE, SUGAR, FD&C YELLOW 6, MODIFIED FOOD STARCH, FD&C RED 3, SODIUM BENZOATE AND POTASSIUM SORBATE (PRESERVATIVES), CARRAGEENAN GUM, FD&C BLUE 1, XANTHAN GUM, CITRIC ACID), GUM TRAGACANTH, PROPYLENE GLYCOL, XANTHAN GUM, CITRIC ACID SOLUTION, SODA BENZOATE, WATER, ORANGE EMULSION (GUM TRAGACANTH, PROPYLENE GLYCOL, XANTHAN GUM, CITRIC ACID SOLUTION, SODA BENZOATE, WATER). BUTTER FLAVOR (VEGETABLE OILS, MILK DERIVATIVES, VEGETABLE GUMS, EGG DERIVATIVES, AROMATIC CHEMICALS, ALCOHOL, ALDEHYDES AND ESTERS). NATURAL AND ARTIFICIAL FLAVORS (WATER, PROPYLENE GLYCOL USP. BENZODIHYDROPYRONE, INVERT SUGAR)