Which food has less impact on blood sugar?

ICING SUGAR (SUGAR, CORNSTARCH), SUGAR, BLEACHED ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID), CREAM CHEESE (CREAM, NONFAT MILK, SALT, LOCUST BEAN GUM, BACTERIAL CULTURE), VEGETABLE SHORTENING (CANOLA OIL, PALM OIL, MODIFIED PALM OIL, MODIFIED PALM KERNEL OIL, MONOGLYCERIDES, POLYSORBATE 60), EGG, CANOLA OIL, SOYBEAN OIL, PUMPKIN CREAM CHEESE FILLING (WATER, HIGH FRUCTOSE CORN SYRUP, CORN SYRUP, PUMPKIN PUREE, MODIFIED CORNSTARCH, SUGAR, CREAM CHEESE [CREAM, NONFAT MILK, SALT, GUAR GUM, PROPYLENE GLYCOL ALGINATE, CARRAGEENAN, LOCUST BEAN GUM, BACTERIAL CULTURE], MODIFIED PALM KERNEL OIL, XANTHAN GUM, LACTIC ACID, SALT, LOCUST BEAN GUM, CARRAGEENAN, SPICE, POTASSIUM SORBATE [PRESERVATIVE], NATURAL AND ARTIFICIAL FLAVOR, CARAMEL COLOR), WATER, PUMPKIN PUREE, VITAL WHEAT GLUTEN, MODIFIED CORNSTARCH, SOYBEAN LECITHIN, LEAVENING BLEND (SODIUM BICARBONATE, SODIUM ALUMINUM PHOSPHATE, SODIUM ACID PYROPHOSPHATE, CORNSTARCH, MONOCALCIUM PHOSPHATE, CALCIUM SULFATE), CRUMBLE TOPPING (BLEACHED ENRICHED FLOUR [WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN, FOLIC ACID], BROWN SUGAR, CANOLA OIL, SUGAR, YEAST, YELLOW CORN FLOUR, SALT, SPICE, CARAMEL COLOR, PAPRIKA EXTRACT COLOR), SPICES, SALT, CORN SYRUP, LEMON JUICE CONCENTRATE, XANTHAN GUM, SODIUM ALGINATE, GUAR GUM, NATURAL AND ARTIFICIAL FLAVOR, POTASSIUM SORBATE (PRESERVATIVE), DATEM, BETA CAROTENE (COLOR).