Preheat oven to 350 degrees Fahrenheit and lightly grease an eight- by eight-inch square baking pan.

Melt the margarine and pour it over the brown sugar in a medium bowl, stirring to coat.

Add the vanilla, soy yogurt, and soy creamer and stir until homogeneous.

Stir together the flour and baking powder. Slowly incorporate the flour mixture into the wet ingredients, stirring just enough to arrive at a smooth mixture.

Pour the batter into your prepared pan. Bake for 25-30 minutes until the sides begin to pull away from the pan and the top is fairly firm. The blondies may still be slightly gooey in the inside, but they will continue to cook once removed from the oven. Besides, they are “fudgy” bars, so you don’t want them to dry out! Wait for the blondies to cool completely before cutting.