Rhubarb Snacking Cake - Olympia Food Co-op

Ingredients

• 1 cup rolled oats
• 1 1/4 cup brown sugar, divided
• 6 tablespoons butter, divided
• 1 cup whole wheat pastry flour
• 1/2 cup unbleached flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup nonfat plain yogurt
• 1 large egg
• 1 cup thinly sliced rhubarb