Bake the Brownies:
Prepare and bake brownies in a 9x13-inch pan according to the box or recipe instructions. Let cool completely before cutting.
Cut into Triangles:
Cut the cooled brownies into long horizontal strips, then slice each strip into triangles to form tree shapes. You should get about 12 triangles.
Add the “Tree Trunk”:
Gently press a halved candy cane into the base of each triangle to create the trunk of the tree.
Decorate:
Use green icing to pipe garlands, zig-zags, or outlines onto each brownie. Add sprinkles or mini candies as “ornaments.” Let icing set.
Serve or Gift:
Arrange on a holiday platter, pack in treat boxes, or wrap individually for gifting!