Grade 9Agriculture

Cooking — Using Flour Mixtures

Flour-based recipes; chapatis, mandazi, cakes; balancing nutrients in mixtures.

📖 3 min read · 3 worked examples · 5 practice questions

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The lesson

Today we're starting our unit on cooking with flour mixtures. By the end of this lesson you'll be able to identify key ingredients, understand how to balance nutrients, and calculate simple flour ratios for dishes like chapatis, mandazi, and cakes. First, notice the list of topics on the slide: we'll explore common flour‑based foods, see how they fit into the CBC Grade 9 Food Production strand, and work through practical examples. Take a moment to think about the last time you helped a family member make chapatis or mandazi. What ingredients did you use, and how did you decide the amounts?

Everyone, let's dive into the basic flour mixture concepts. We'll look at what each ingredient does in a simple recipe. First, flour provides the carbohydrates and the structure of the dough, much like the bricks that hold a house together. Next, water hydrates the gluten proteins in the flour, giving the dough elasticity—think of it as letting a rubber band stretch. Adding fat, like oil or butter, coats the flour particles, making the final product tender and adding flavor—similar to how adding butter to Ugali softens the texture. Finally, leavening agents such as yeast or baking powder create bubbles that make the dough rise, just like the air that lifts a hot air balloon. Any questions so far? For example, why do you think a cake would be dense without enough water or fat?

Worked examples

Simple Chapati Dough

Let's work through our first example: a simple chapati dough made with everyday Kenyan kitchen measures. Here are the basic ingredients: two cups of whole‑wheat flour, half a cup of warm water, and a pinch of salt. These are the building blocks for the dough. Notice the water amount is one‑quarter of the flour volume. That's our flour‑to‑water ratio of 4 : 1, which determines how soft or firm the chapati will be. The table breaks down each ingredient by weight and percentage. For example, the flour makes up 80 % of the total weight, providing the carbohydrates, while the water contributes 20 % for hydration, and the tiny pinch of salt adds flavor and a bit of sodium. When we mix these together, the dough feels pliable and slightly sticky—perfect for rolling thin chapatis. The nutrient balance is high in carbs, moderate in protein from the whole‑wheat flour, and low in fat, making it an energy‑rich staple for many Kenyan families. Any questions about the ratio or the table before we move on to the next example?

Mandazi (Kenyan Sweet Fry)

Let's walk through Worked Example 2: Mandazi, a popular Kenyan sweet fry. First, the ingredients: 2 cups of all‑purpose flour, a quarter cup of sugar, a quarter cup of coconut milk, one egg, and one teaspoon of yeast. These are the base components we'll adjust. Because we added coconut milk, we need more flour to keep the dough from becoming too wet. We adjust the flour‑to‑liquid ratio to roughly 5 : 2, which balances the extra liquid. Nutritionally, the coconut milk contributes healthy fats, while the egg adds protein. The mandazi becomes richer in both fat and protein compared to a plain chapati. At this bar chart: you can see the macronutrient distribution of mandazi compared to chapati—more carbohydrates, a noticeable rise in fat, and a boost in protein.

Simple Sponge Cake

Let's dive into Worked Example 3: a simple sponge cake that shows how we can balance carbs, protein, and fat for a healthier snack. First, these are the key ingredients: 1½ cups flour, ½ cup yogurt, 2 eggs, ¼ cup oil, and 1 teaspoon baking powder. Notice the yogurt and eggs provide protein, while the oil contributes fat. Let's calculate the protein contribution. Each egg gives about 6 g of protein, and the yogurt adds roughly 4 g per half‑cup. Total protein = 2 × 6 g + 4 g = 16 g for the whole batter. If we reduce the oil to 2 tablespoons, we lower the fat while the yogurt keeps the cake moist—great for a lighter treat. Here's the nutrient summary per slice. You can see how the protein, carbohydrate, and fat values balance out, giving us a snack that's both tasty and nutritious.

Practice questions

Remember, a soft Kenyan chapati needs a fairly wet dough—about 0.
When we talked about mandazi, the ingredient that boosts protein the most is eggs. Even though flour provides some protein, a single egg adds roughly 6 g of high‑quality protein, far more than the other additives.
For the nutrient bar chart, calculate calories from each macronutrient: carbs × 4 kcal/g = 180 kcal, protein × 4 kcal/g = 24 kcal, fat × 9 kcal/g = 108 kcal. Carbohydrate clearly supplies the largest share, protein is just under 10 % of total calories, and fat contributes about a third.
First, remember the 4:1 flour‑to‑water ratio we used for chapati dough: for every 4 g of flour you need 1 g of water. If each chapati uses 30 g of flour, ten chapatis need 300 g of flour, so you'll need 75 g of water.
For the low‑fat cake flour mix. A balanced blend might be 50 % whole‑wheat flour, 30 % oat flour, and 20 % rice flour by weight.

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Cooking — Using Flour Mixtures

📖 The lesson

✏️ Worked examples