Quarter: 1st July 8, 2019 Content Standard: Performance Standard: I. Objectives: At the end of the lesson, the learners should be able to… a. identify the uses of eggs in culinary; b. appreciate the uses of eggs in culinary. II. Content: A. Subject Matter: Uses of Eggs in Culinary B. Materials: laptop, LCD C. Reference/s: Learner’s Material Cookery G10 pp. 65-67 III. Learning Activities: A. Daily Routine Prayer, Greeting, Checking of Cleanliness, Checking of Attendance B. Discussion a. Activity What are the known egg dishes that are used in culinary? b. Analysis Why do you need to know the uses of eggs in culinary? c. Abstraction Egg is cooked in many ways. It can be the main protein dish; it can be a main or accessory ingredient in dishes from appetizers to desserts. It can be cooked by dry heat, moist heat, with or without oil, as simply or as elaborately as one’s inclination for the moment. Indeed it can be eaten anywhere. Effect of Heat on Eggs 1. Coagulation of proteins: white at 60-65 0C, yolk at 65-700C. Beyond this temperature, over coagulation occurs and water is squeezed out causing shrinkage resulting in a tough product. 2. Formation of greenish discoloration at the interface of the yolk and white when egg is overcooked Due to the reaction between the iron in the yolk and the hydrogen sulfide liberated from the sulfur containing ferrous sulfide. Reaction is favored by - High cooking temperature - Prolonged cooking Reaction is prevented by immediate cooling of the egg (e.g. immersing in cold water) after cooking Uses of Egg 1. Cooked and served “as is”, e.g. in the shell – soft cooked ( 5 minutes simmering) or hard cooked (15 minutes simmering) poached – cooked in simmering water; addition of salt and vinegar hastens coagulation fried – keep low to moderate temperature scrambled – addition of sugar delays coagulation; addition of liquids and acids decreases coagulation point omelet 2. Eggs as emulsifier Lecithin and lysolecithin are responsible for the remarkable ability of egg yolk to act as an emulsifying agent; both are phosphoproteins containing polar and non-polar ends such that the polar end holds water while the non-polar end holds the fat, thus, prevent oil droplets in suspension from coalescing. 3. As binding, thickening agent, and gelling agents Eggs are useful as binding, thickening and gelling agents because they contain proteins that are easily denatured by heat Using whole egg requires lower coagulation temperatures resulting in a stiffer gel Addition of sugar, raises coagulation temperature producing softer, weaker gel Softer gel is produced with the addition of scalded milk and acid In cooking custards, Bain Marie, double boiler or steamer is used to avoid boiling which can produce a porous custard Soft custards are produced by constant stirring. 4. As foam When egg is beaten albumen is denatured, air is incorporated as white is stretched into thin films With continued beating, the air cells are subdivided and volume is increased Protein network dries up and stabilizes the gas or air foams - If only egg whites are used, the color turns white and soft peaks are formed. The egg proteins collect at the air/liquid interface of the air bubble and undergo surface denaturation. - If whole eggs or only egg yolks are used, the color becomes pale yellow with continued beating; volume is increased (but not as much as when only whites are used); no surface denaturation occurs. - With further beating of egg whites, liquid drains out, air bubbles coalesce and foam breaks. - The same changes occur when the foam is allowed to stand too long. - Maximum stability is reached at soft stage while maximum volume attained is at stiff stage - Stages in foam formation A. frothy – large air bubbles that flow easily B. soft foam – air cells are smaller and more numerous; foam becomes whiter; soft peaks are formed when beater is lifted C. stiff foam – peaks hold their shape; when bowl is tipped, it holds, moist and glossy D. dry – moistness and glossiness disappear; specks of egg white are seen Factors to be considered in foam formation (leavening agent) a. Beating time and temperature: as the time of beating increases, both volume and stability of the foam increases initially, then, decreases; white can be beaten/whipped more readily at room temperature than at refrigerator temperature – refrigerated eggs are more viscous, thus, hard to beat/whip. b. Eggs beaten at room temperature whip better resulting in bigger volume and finer texture. c. Whole eggs or egg yolk require more beating to produce a good foam d. Stored eggs foam faster but produce smaller volume than fresh eggs. e. Acids (e.g. cream of tartar, 1 t per cup) increase the stability of foams, but when added too early, delay foam formation (reduced volume) thus, increases the time necessary for beating f. Sugar also increases the stability of foams but delays foams formation (reduced volume), thus, it should be added after foaming has started and soft peaks are formed; sugar retards the denaturation of egg white g. Addition of soda increases stability and volume h. Addition of salt lowers quality of the foam i. Type of egg: duck eggs do not foam well because they lack ovumucin j. Dilution of egg white by water produces bigger volume but lesser foam; this produces more tender cakes, but in meringues, syneresis occurs. k. Applications of foam in cookery as leavening e.g. in angel cake, sponge cake, chiffon cakes as meringue, e.g. (a) soft meringue for topping of cream, chocolate, or lemon pie, requires a proportion of two tablespoons sugar per egg white (b) hard meringue for confections, base of fruit pies or Sans Rival Cake, requires a proportion of ¼ cup sugar per egg white structural and textural agent – tenderness and fluffiness to products, e.g. fluffy or foamy, soufflé, divinity, foam cakes, popovers 5. As coloring and flavoring agent d. Assessment Answer the following. 1. – 5. What are the five uses of eggs? 6. – 9. What are the 4 stages in foam formation? 10. This is cooked in simmering water; addition of salt and vinegar hastens coagulation IV. ASSIGNMENT A. Follow up. Give atleast 5 examples each of recipes that uses; a. Fresh eggs b. Frozen eggs c. Dried eggs. B. Study the uses of eggs in culinary. Prepared by: MACY A. BAYANI Subject Teacher Checked by: MACEDONIO P. DE ASIS Key Teacher-T.L.E Noted by: MARISSA E. CAPISTRANO., Ed.D Officer-in-Charge TCIS