Preheat oven to 350°. Butter a 9x 13” baking dish and line the bottom with parchment paper.
In a medium size bowl, mix together the flour, baking powder, salt, oats and brown sugar. Stir together to mix the dry ingredients. Using a pastry blender or your fingers, mix the butter into the dry mix. If using your fingers pinch the butter into the dry mix to distribute the butter into small pieces about the size of a pea.
Press half of the mixture into the prepared pan. Spread the jar of jam or fruit spread evenly on top of the crust. Sprinkle the other half of the oat mixture on top of the fruit spread. Bake in your oven for 30 – 40 minutes. Cool completely in the pan. Cut into squares.
Recipe adapted from Just Jans