Butter: Chilly cubed butter worked to the dry ingredients till coarse and crumbly adds richness into the bars. Chopping it in as though making pastry minimizes the risk that you’ll overmix the batter, which may lead to a troublesome bake.small loaf pan - I exploit an eight" x 4" loaf pan for one batch (you can also use 2 to 3 mini loaf pans). In