The lowest density of cookie dough were formulated US-treated IES tempered at 25 °C . than the ones obtained with the non US-treated counterpart. The highest dough density was observe for the cookies made with the non US-treated IES tempered at 25 °C. the size of lipid crystals in US-treated IES contributes to air incorporation in cookie dough. it can be seen that slightly smaller crystals are obtained when the US-treated IES .Smaller crystals adsorb to air bubbles incorporated into batter during mixing .These slightly smaller crystals resulted in better air incorporation and lower dough density as shown in Fig. 3A.