Peanut Butter Nanaimo Bars

A Canadian bakery staple gets a serious upgrade with a thick layer of peanut butter custard sandwiched between a crunchy chocolate crumb base and a snappy chocolate shell on top.

The base holds together because melted chocolate and butter bind the graham crumbs, coconut, and chopped nuts into a firm, dense layer. Press it into the pan evenly and chill it solid before spreading the filling, or the layers will blend together.

That middle layer is where the magic happens. Custard powder mixed with peanut butter and powdered sugar creates something dense and fudgy, almost like a peanut butter truffle. Beat it well with an electric mixer so it spreads smoothly over the chilled base.

The chocolate topping needs to be poured while still warm and fluid, then tilted to cover the filling edge to edge. Once it sets, that thin shell gives a clean snap when you bite through.

Kitchen Tips

• Score the bars through the chocolate layer before it fully hardens. Trying to cut through set chocolate cracks it into jagged pieces.
• Use smooth peanut butter, not chunky. Chunky makes the filling layer uneven and harder to spread.
• Keep bars refrigerated. The filling softens quickly at room temperature.
• Line the pan with parchment for easy removal. Lift the whole slab out and cut on a board for cleaner edges.

Variations

• Classic Nanaimo: Skip the peanut butter and use vanilla custard filling for the traditional version.
• Mint chocolate: Replace peanut butter with mint extract and a drop of green food coloring.
• Almond joy: Swap peanut butter for almond butter and use toasted almonds in the base.