Preheat your oven to 325 degrees and line a cookie sheet with parchment paper.

Beat your butter and sugar until light and fluffy.

Quickly mix in your almond extract and egg.

Mix in your flour and separate your dough into bowls.

Mix in blue food coloring in one bowl and green (or a mix of yellow and blue) in the other.

Form your dough into two dough balls and roll your blue dough out to 1/2" thick.

Break apart pieces of your green dough, lightly press them onto your blue dough, and continue to roll your dough until it's about 1/4" thick.