Grade 4 finished their study of chemical and physical changes in food by baking a cake. This cake is sometimes called a wacky cake or depression cake. The ingredients are probably things you have at home. No milk or eggs are required. It is a good way to see (and taste) the reaction of baking soda and vinegar. The bubbles formed in the reaction help the cake rise. The vinegar and baking soda undergo a chemical change so they lose their characteristic taste.
It was good practice measuring.
Here is the recipe so you can try it at home.
Mix the following dry ingredients in a cake pan. 10 x 20 cm is a good size:
90g unbleached all-purpose flour
100g sugar
10 g unsweetened cocoa (Optional)
3g baking soda (bicarbonate)
1g salt
2.5g vanilla powder
Mix the following wet ingredients in small bowl.
2.5ml vinegar
35ml vegetable oil
120ml cold water
Pour the liquid ingredients into the dry ingredients and mix well.
Bake at 175°C for about 25 minutes: Until cake is springy and pulls away from the sides.
If you want to use American measurements, google wacky cake. You will find the recipe.
Bon appetit!
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