Fill a pastry bag or resealable plastic bag with about 1 cup of peanut butter (or soy butter) and snip off the tip to form a quarter-inch opening.
To begin building, stand two pieces of matzoh, with the edges forming a right angle to one other, upright on the cardboard base.
Using the pastry bag, pipe a line of peanut butter (or soy butter) along the seam where the two pieces of matzoh meet.
Repeat with two more pieces of matzoh to form a square.
Pipe peanut butter (or soy butter) into the inside corners and along the inside of the base to reinforce the structure.
With the four walls intact, sprinkle the matzoh meal on the peanut butter (or soy butter) surrounding the house, to create the appearance of sand.
Carefully transfer the entire structure into the refrigerator to chill and set for 1 to 2 hours.