Ingredients

• 1 teaspoon unsalted butter , or as needed
• 1.5 cups white sugar , divided
• 1 stick unsalted butter , room temperature
• 2 extras large eggs
• 1 cup plain yogurt
• 1 teaspoon vanilla extract
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 0.5 teaspoons salt
• 1 teaspoon ground cinnamon
• 5 medium ripe plums , pitted and sliced
• 3 large ripe peaches - peeled , pitted, and sliced

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C). Butter a 9-inch square baking pan.
2. 2 Beat 1 cup sugar and 1 stick butter together using an electric mixer until light and fluffy. Add eggs, 1 at a time, beating after each addition. Add yogurt and vanilla extract; mix until batter is smooth. Add flour, baking soda, baking powder, and salt to the batter and mix until just combined. Combine remaining 1/2 cup sugar and cinnamon in a separate bowl.
3. 3 Spread batter evenly into the prepared pan and sprinkle with 1/2 of the cinnamon-sugar mixture. Top batter with plums and peaches; sprinkle with remaining cinnamon-sugar mixture.
4. 4 Bake in the preheated oven until a toothpick inserted into the center comes out clean, 45 minutes to 1 hour, making sure not to overbake. Serve warm or at room temperature.

Nutrition per serving