These results suggest that more granular fraction is necessary to maintain the muffin crust color and compensate for the pigment loss. Finally, granules modifications during the lyophilization process produced a final muffin with the same crust color as the egg yolk product.
As regards the crumb and compared with the crumb of the whole egg yolk muffins, those elaborated employing granules (100%, 60% and lyophilized recipes) exhibited delta e (ΔE )values higher than 3 units in each case. These color changes, due to the removal of the plasmatic fraction, produce less reddish and yellowish muffins than the egg yolk recipe.