Bottom layer:
Frozen peach slices (~3–4 cups, single layer).
Sprinkle 2–3 tbsp brown sugar + pinch of cinnamon.
Cake batter:
2¼ cups all-purpose flour
2¼ tsp baking powder
¾ tsp baking soda
¾ tsp salt
½ cup butter, softened
1 cup brown sugar
1/4 cup pure maple syrup
2 tbsp vanilla extract
2 large eggs
1 cup milk + 1 tsp lemon juice