If the point is that cost/calorie has risen too much, it's substantially worse in the cost/calorie sense to eat prepared food out of the home versus cook at home.
As an aside, a quickbread like banana bread happens to be one of the simplest to make with some of the cheapest shelf-stable ingredients, and almost every home has an oven and access to the ingredients. For those who like it, I highly recommend this recipe (Mark Bittmans):
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8 tablespoons (1 stick) butter, plus some for greasing the pan
1 ½ cups all-purpose flour
½ cup whole wheat flour
1 teaspoon salt
1 ½ teaspoons baking powder
¾ cup sugar
2 eggs
3 very ripe bananas, mashed with a fork until smooth
1 teaspoon vanilla extract
½ cup chopped walnuts or pecans
½ cup grated dried unsweetened coconut
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Step 1
Heat the oven to 350 degrees. Grease a 9- by 5-inch loaf pan.
Step 2
Mix together the dry ingredients. With a hand mixer, a whisk, or in the food processor, cream the butter and beat in the eggs and bananas. Stir this mixture into the dry ingredients; stir just enough to combine (it’s okay if there are lumps). Gently stir in the vanilla, nuts, and coconut.
Step 3
Pour the batter into the loaf pan and bake for 45 to 60 minutes, until nicely browned. A toothpick inserted into the center of the bread will come out fairly clean when it is done, but because of the bananas this bread will remain moister than most. Do not overcook. Cool on a rack for 15 minutes before removing from the pan.