Which food has less impact on blood sugar?

BROWNIE-SUGAR, ENRICHED WHEAT FLOUR BLEACHED (FLOUR, NIACIN, IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), PALM OIL, CORN SYRUP SOLIDS, COCOA PROCESSED WITH ALKALI, SOYBEAN OIL, CONTAINS 2% OR LESS OF ARTIFICIAL FLAVOR, CARAMEL COLOR, CORNSTARCH, EGG WHITES, LEAVENING (BAKING SODA, SODIUM ALUMINUM PHOSPHATE), NONFAT MILK, RED 40, SOY LECITHIN (CONTAINS SULFITE) WHITE ICING-SUGAR, VEGETABLE SHORTENING (INTERESTERIFIED SOYBEAN OIL, SOYBEAN OIL, HYDROGENATED COTTONSEED OIL, MONO- AND DIGLYCERIDES, POLYSORBATE 60), CORN SYRUP, WATER CONTAINS 2% OR LESS OF SALT, CITRIC ACID, CORNSTARCH, ALPHA TOCOPHEROL, NATURAL AND ARTIFICIAL FLAVOR, DEXTROSE, TITANIUM DIOXIDE (FOR COLOR), POTASSIUM SORBATE (PRESERVATIVE) CHOCOLATE ICING ALSO CONTAINS-COCOA PROCESSED WITH ALKALI COLORED ICING ALSO CONTAINS-SHORTENING [PALM OIL, CANOLA AND/OR SOYBEAN OIL, PARTIALLY HYDROGENATED SOYBEAN [PALM OIL, CANOLA AND/OR SOYBEAN OIL, PARTIALLY HYDROGENATED AND COTTONSEED OILS, MONO AND DIGLYCERIDES, POLYSORBATE 60, TBHQ (PRESERVATIVES)], CONTAINS LESS THAN 2% OF MALTODEXTRIN, MODIFIED CORN STARCH, GUAR GUM, GUM ARABIC, LOCUST BEAN GUM, CARAMEL COLOR, INVERT SUGAR, HIGH FRUCTOSE CORN SYRUP, PHOSPHORIC ACID, SODIUM BENZOATE (PRESERVATIVE), BLUE 1, BLUE 1 LAKE, YELLOW 5, YELLOW 5 LAKE, YELLOW 6, YELLOW 6 LAKE, RED 40, RED 40 LAKE, RED 3, BLUE 2 LAKE IF CHOCOLATE FUDGE ICED ALSO CONTAINS- VEGETABLE OIL (PALM, CANOLA), SWEETENED CONDENSED MILK (MILK, SUGAR), MONO AND DIGLYCERIDES, POLYSORBATE 60 QUINS- SUGAR, RICE FLOUR, PARTIALLY HYDROGENATED VEGETABLE OIL GUM, CONFECTIONER'S GLAZE, CARRAGEENAN, SOY LECITHIN, RED 40, YELLOW 6, YELLOW 5, BLUE 1, ARTIFICIAL FLAVOR, BLUE 2