Which food has less impact on blood sugar?

CAKE- BLEACHED ENRICHED FLOUR (WHEAT FLOUR, NIACIN, REDUCED IRON, THIAMINE MONONITRATE, RIBOFLAVIN AND FOLIC ACID), SUGAR, SOY OIL, EGGS, WATER, WALNUTS, HIGH FRUCTOSE CORN SYRUP, EGG WHITES, APPLES (WITH SODIUM SULFITE AS PRESERVATIVE), MODIFIED CORN STARCH, SPICE, SALT, BAKING SODA, SODIUM ALUMINUM PHOSPHATE, MOLASSES, PROPYLENE GLYCOL ESTERS, WHEAT GLUTEN, CORN SYRUP, SORBITAN MONOSTEARATE, POLYSORBATE 60, XANTHAN GUM, SODIUM STEAROYL LACTYLATE, ARTIFICIAL FLAVOR, CELLULOSE GUM, GUAR GUM, MONO AND DIGLYCERIDES, SODIUM BENZOATE AND BENZOIC ACID (PRESERVATIVES), WHEY (MILK), SOY LECITHIN, ICING-POWDERED SUGAR, VEGETABLE SHORTENING (PALM OIL, CANOLA OIL, AND/OR SOYBEAN OIL, MONO AND DIGLYCERIDES, POLYSORBATE 60), LIQUID SUGAR, CORN SYRUP, HIGH FRUCTOSE CORN SYRUP, WATER, CARAMEL COLOR, SALT, SODIUM PROPIONATE AND POTASSIUM SORBATE AND SORBIC ACID (PRESERVATIVES), POLYGLYCEROL ESTERS OF FATTY ACIDS, NATURAL AND ARTIFICIAL FLAVOR, CORNSTARCH, DEXTROSE, RED 40, CITRIC ACID, WHITE CHOCOLATE WITH PRINT- SUGAR, COCOA BUTTER, WHOLE MILK POWDER, LACTOSE (MILK), EMULSIFIERS (SOY LECITHIN, POLYGLYCEROL POLYRICINOLEATE), NATURAL VANILLA HYDROGENATED PALM KERNEL OIL, COLORS: TITANIUM DIOXIDE, FD & C RED 40, BLUE 2, YELLOW 6, BLUE 1, YELLOW 5, COCONUT OIL, NONFAT MILK POWDER, PALM KERNEL OIL, MONOGLYCERIDES, ARTIFICIAL VANILLA FLAVOR, EDIBLE GLITTER-SUGAR, CARNAUBA WAX, HYDROXYPROPYL METHYLCELLULOSE, PROPYLENE GLYCOL, MICA, TITANIUM DIOXIDE, FD & C BLUE 1, RED 3, RED 40, YELLOW 6, YELLOW 5, BLUE 2, RED 4.