Meanwhile, create 6-inch (15 cm) maple leaf stencil out of waxed paper. Place stencil on centre of cake, with top of maple leaf pointing toward one long end. Pour sprinkles over stencil, shaking stencil first before removing so sprinkles remain within lines. Lightly mark two lines, 1/2-inch (1 cm) from edges of the maple leaf, along short ends. Pour sprinkles along sides of cake to create red bands.