I always start by washing the strawberries under cool water and patting them completely dry with a paper towel. Any leftover moisture will make the chocolate seize or slide right off, so I take my time here. Leave the green stems attached, since they give each berry its ghostly, tapered shape once dipped.
I add the chopped white chocolate and shortening to a microwave-safe bowl and heat it in 30-second bursts, stirring after each one. This slow approach keeps the chocolate from scorching, which happens fast with white chocolate. Once it's smooth and glossy, I stir in the almond extract for a little extra flavor.
Holding each strawberry by the stem or a toothpick, I dip it into the melted chocolate and twirl it gently so the coating is even. I let the excess drip back into the bowl before setting the berry stem-up on the parchment-lined tray. Working in small batches keeps the chocolate from cooling too fast.
Once the berries are coated and slightly set, I use a toothpick dipped in black gel or melted chocolate chips to add two small eyes and a round mouth to each one. I try to keep the faces simple, since a sweet, minimal face reads as "cute ghost" much better than an overly detailed one. This step is where the berries really start to look like little ghosts.
I place the finished tray in the refrigerator for about 10 minutes so the white chocolate firms up completely. This also helps the faces set in place without smudging when I move the berries to a serving plate. Once they're firm to the touch, they're ready to serve.