To make layering easier, spread ice cream on a baking sheet, freeze it, and then cut it into squares.
To keep cookies from breaking when pushed over ice cream, slightly soften them.
When constructing sandwiches, use parchment paper to keep your hands clean and keep the sandwiches together.
For added taste and texture, roll the ice cream's edges in almonds, small chocolate chips, or sprinkles.
For precisely matched shapes, use a cookie cutter to cut both cookies and ice cream.