Which food has less impact on blood sugar?

FILLING (VEGETABLE OIL [PALM OIL, PALM KERNEL OIL, SUNFLOWER OIL], SUGAR, SKIM MILK POWDER, SUNFLOWER LECITHIN [AN EMULSIFIER], NATURAL VANILLA FLAVOR), TART SHELL (ENRICHED WHEAT FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], MALTED BARLEY FLOUR, MARGARINE [PALM OIL, WATER, SOYBEAN OIL, SALT, SOY LECITHIN, NATURAL FLAVOR, BETA- CAROTENE (COLOR), VITAMIN A PALMITATE], CHOCOLATE CRUMBS [WHEAT FLOUR, CANE SUGAR, PALM OIL, COCOA PROCESSED WITH ALKALI, CARAMEL COLOR, SODIUM BICARBONATE, WHEY, SALT], SUGAR, EGGS, GLYCERIN (GLYCERIN, WATER, NATURAL FLAVORS], COCOA PROCESSED WITH ALKALI, WATER, CORN STARCH, SOY LECITHIN), WHIPPED TOPPING (HIGH FRUCTOSE CORN SYRUP, VEGETABLE SHORTENING [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), COOKIES (UNBLEACHED ENRICHED FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], SUGAR, PALM AND/OR CANOLA OIL, COCOA PROCESSED WITH ALKALI, INVERT SUGAR, BAKING SODA AND/OR CALCIUM PHOSPHATE, SALT, SOY LECITHIN, CHOCOLATE, NATURAL FLAVOR).