Bake a sheet cake the size that you need. Ice the cake in white
buttercream icing, making sure that it is nice and smooth.
Let it set for at least a half hour.
With an icing filled bag and round tip #5 draw the flag on the
cake top. You will use the
round tip #5 to do all the outline work and the star tip #16 to do all
the fill in work.
First make the stars on the flag with the
white icing. Now outline the blue area of the flag with blue icing and
then fill it in with the same color icing.
Next make a red
icing and outline all the red stripes with it. Fill them in with the
same red icing. Outline the white stripes with white icing and
fill them in with the same white icing.
Next you are going to fill in the sides of the cake. Start on the
back corner and make
three straight rows of red, then three straight rows of white, and then
three straight rows of blue. Repeat this pattern all the way
around the cake.
With the white icing and tip #18 make a shell border around the
top and bottom edge of the cake sides. The
message may be written on the cake board using tip #5.