Baby Bootie Cakes
Each bootie consists of two cake rounds of different heights. To make booties, trim top of sheet cake so it is level. Place trimmed cake on work surface. Using a 2 1/2-inch biscuit or cookie cutter, cut out 12 circles from cake, keeping the circles as close together as possible. Discard the scraps or save for a delicious snack.
To make toe pieces for booties, cut four circles in half horizontally, making eight shorter circles. Trim each short circle by cutting a straight line 1/2-inch in from the edge. Place one tall and one short circle on a piece of waxed paper or parchment. Using a dab of buttercream as glue, affix trimmed edge of shorter circle to taller one. This forms the basic bootie shape. Repeat with other pairs.
Using an offset spatula or a butter knife, thinly coat each bootie with a layer of buttercream to seal in the crumbs; giving the shoe shape by adding more icing to the front and top. Refrigerate the booties until the crumb coat has set. Decorate the booties one at a time. Remove from the refrigerator, and cover with a final coat of buttercream, shaping and smoothing the shoes as you go.
Pipe laces and trim to resemble a child's shoe: Fit couplers onto piping bags and fill halfway with tinted buttercream. To make dots and trim, use a No. 4 tip. To fashion thin, dainty laces and other delicate details, use a No. 3 tip. To pipe small stars, use a No. 13 tip. Chill booties again until buttercream is firm, then transfer to serving platters.