Homemade peanut butter cups

Mix the speculoos crumbs with the powdered sugar and sift out the larger chunks.

Microwave the butter and peanut butter until melted together, about a minute.

Pour the melted butter and peanut butter into the crumb and sugar mixture and mix until well combined; set aside.

Melt the chocolate chips with butter in a bowl set over a pot of boiling water.

Set cupcake wrappers in a muffin tray. Spoon a thin layer of chocolate into the bottom and up the sides; remove any excess.

Tap the pan against the surface to even the chocolate, then refrigerate 5 minutes.

Spoon in the peanut butter filling without going above the chocolate wall, cover with more chocolate, and refrigerate until hard.