Which food has less impact on blood sugar?

STRAWBERRY FILLING (WATER, SUGAR, STRAWBERRY PUREE, CORN SYRUP, MODIFIED FOOD STARCH (CORN), CITRIC ACID, SALT, PRESERVATIVES (POTASSIUM SORBATE, SODIUM PROPIONATE), ARTIFICIAL FLAVOR, RED 40), CUPCAKE (SUGAR, WATER, BLEACHED ENRICHED WHEAT FLOUR (FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), SOYBEAN OIL, DRIED WHOLE EGGS, SKIM MILK POWDER, CORNSTARCH, LEAVENING (SODIUM ACID PYROPHOSPHATE, BAKING SODA, MONOCALCIUM PHOSPHATE, SODIUM ALUMINUM PHOSPHATE, ALUMINUM SULFATE), SOY LECITHIN, SALT, DRIED EGG WHITES (CONTAINS SODIUM LAURYL SULFATE), MODIFIED CORNSTARCH, MONO- AND DIGLYCERIDES, WHEY POWDER, WHEAT STARCH, VEGETABLE SHORTENING (PALM AND/OR PALM KERNEL OIL), POLYGLYCEROL ESTERS OF FATTY ACIDS, PROPYLENE GLYCOL MONOESTERS OF FATS & FATTY ACIDS, WHEAT PROTEIN ISOLATE, NATURAL & ARTIFICIAL FLAVOR, XANTHAN GUM, DIACETYL TARTARIC ACID ESTERS OF MONO AND DIGLYCERIDES, POLYSORBATE 60, SODIUM CARBOXYMETHYLCELLULOSE, YELLOW 5 (TARTRAZINE), SOY PROTEIN), HIGH FRUCTOSE CORN SYRUP, VEGETABLE SHORTENING (FULLY HYDROGENATED PALM KERNEL OIL), WATER, SUGAR, DEXTROSE, SODIUM CASEINATE (MILK), SOY PROTEIN CONCENTRATE, NATURAL AND ARTIFICIAL FLAVORS (MILK), MODIFIED CELLULOSE, POLYSORBATE 60, POTASSIUM SORBATE (PRESERVATIVE), SALT, POLYGLYCEROL ESTERS OF FATTY ACIDS, GUAR GUM, XANTHAN GUM., SUGAR; COCOA BUTTER; WHOLE MILK POWDER; NONFAT DRY MILK; SOY LECITHIN (AN EMULSIFIER); NATURAL VANILLA EXTRACT