1/2 cup margarine, at room temperature
1 cup sugar
2 cups flour
1 teaspoon baking soda
1 teaspoon salt
1 cup mashed very ripe bananas
1/2 cup plain yogurt
1 teaspoon vanilla
1/2 cup chocolate chips
Wash your hands. Preheat oven to 350°F (177°C). Butter and flour a 9 x 5 x 3-inch (23 x 13 x 8-cm) loaf pan.
Mix the butter and sugar in a mixing bowl until they are light and fluffy. Mix in the eggs.
In another bowl, mix the flour, baking soda, and salt. Mix them into the butter mixture. Mix in the bananas, yogurt, and vanilla. Stir in the chocolate chips.
Pour the batter into the pan. Sprinkle a few more chocolate chips on top.
Bake the bread 55–60 minutes. Let it cool in the pan for 10 minutes, and then turn it out onto a rack to cool.