Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. 70 Principles of Food Science Lab Manual 9. Remove muffins from the tin. With a serrated knife, cut the muffins in half from top to bottom. Place the muffins on a plate and label with the variation number. 10. Select one sample of each variation. Evaluate each sample for cell size, color, and shape before taste testing. 11. Crumble one-fourth of a muffin of your variation into 50 mL of distilled water. Mix to make a smooth paste. Measure and record the pH of the paste. Also, record the pH of the other variations as measured by the other lab groups. Pre-Lab Purpose: _____________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________ Procedure summary: _____________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________ Lab Data Variation 1 Variation 2 Variation 3 Variation 4 Cell size Color Shape Flavor pH Post-Lab Questions 1. Which leavening agent produced the tallest muffins? _ _________________________________________________________________________________________________________________ Which produced the shortest? _ _________________________________________________________________________________________________________________ 2. Which leavening agent produced the best flavor? _ _________________________________________________________________________________________________________________ 3. Which, if any, of the variations have a bitter aftertaste? _ _________________________________________________________________________________________________________________ 4. Were there any differences in pH? If so, were the differences related to flavor or color differences? _ __________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________