Step 1

Preheat the oven to 375 degrees F (190 degrees C). Coat a 9-inch square baking pan with nonstick cooking spray.

Step 2

Combine almond milk and vinegar in a small bowl. Set aside for 5 minutes.

Step 3

Beat margarine and 2 tablespoons white sugar together using an electric mixer in a large bowl until creamy. Add flour and baking powder and combine using a fork or pastry blender until mixture resembles coarse crumbs. Stir in milk mixture and vanilla extract until just combined. Set biscuit batter aside.

Step 4

Combine peaches, brown sugar, 1/4 cup white sugar, cornstarch, and cinnamon in a bowl until peaches are coated. Place peaches into the bottom of the prepared pan. Top and cover with biscuit batter mixture.

Step 5

Bake in the preheated oven until the tops of the biscuits are lightly browned, 40 to 45 minutes. Serve warm.