Place the speculoos biscuits in a sealed plastic bag and crush them using a rolling pin until finely powdered.
Transfer the biscuit powder to a large mixing bowl.
Add the unsweetened cocoa powder to the biscuit crumbs.
If using Turkish halva, crumble it into the mixture.
Add the crushed peanuts.
Mix all dry ingredients thoroughly to ensure even distribution.
Gradually add softened butter and honey to the dry mixture.
Knead the mixture with your hands until it reaches a cohesive, moldable consistency.
Taste and adjust sweetness by adding more honey if desired, ensuring the dough is not overly sweet.
Take small portions of the dough and press them into silicone molds of your choice to achieve various shapes.
Place the filled molds in the freezer for about 5 minutes to firm up.
Carefully remove the shaped pieces from the molds and arrange them on a tray.
Refrigerate the tray to keep the shapes firm.
Melt the white chocolate using a double boiler (bain-marie) until smooth.
Pour a small amount of melted white chocolate into the cleaned silicone molds, covering the bottom.
Immediately press the shaped dough pieces back into the molds over the melted chocolate, applying gentle pressure.
Return the molds to the freezer for at least 30 minutes to allow the chocolate to set completely.
Once the chocolate has solidified, carefully unmold the Bniwen.
Place them in decorative paper cups or directly onto a serving platter.
Store the finished Bniwen in the refrigerator until ready to serve.