Chocolate bar mould: which one to choose

Choose the mould by the weight of the cavity, not by the design: 105 g for a large bar, 48 g for a bar to give, 32 g for a snacking bar. At Chocolate World, read on 25 October 2026, that costs from 20.80 € to 22.90 €. The weight decides everything else.

Which cavity weight should you choose for a bar?

The weight of the bar you want to hold in your hand, quite simply. The three moulds I read on the Antwerp maker's shop split the range between them: a large format, a medium one and a small one.

VAT is not specified on the CW1421 sheet. The other two show a price including all taxes. All three are polycarbonate, and none gives a stock level.

How much couverture does a bar take?

The cavity weight, nothing else. A kilo of couverture, divided by 105, by 48 or by 32, gives the number of bars. I redid the calculation for three common needs, before any inclusion.

The calculation is dated 25 October 2026 and allows for no loss. The bowl, the scraper and the worktop always keep a little chocolate. For a first attempt, temper at least 1.2 kg rather than the strict minimum: a bath that runs short cannot be rescued halfway through filling.

Belgian couverture is easy to find: Callebaut and Belcolade come as callets, which our page on chocolate pistoles helps you choose.

Why does an 8 to 9 mm cavity limit inclusions?

Because it is shallow. The three sheets state between 8 and 9 mm of depth, and that is what caps the filling.

A whole hazelnut is over a centimetre across: it would stick out of the bar, and the couverture would never coat it. A whole almond, the same. Here is what goes in without trouble, laid at the bottom of the cavity before the chocolate is poured:

• crushed hazelnuts or almonds, in fragments finer than the depth;
• crisped pearls and puffed rice, which weigh almost nothing;
• dried fruit cut into small dice, apricots or raisins;
• flaked salt, set on top just after filling.

I read the sheet's weight as a cavity filled with plain chocolate. Inclusions take up room in the cavity, so the moulded bar weighs a little less than 105 g of couverture. I cannot put a figure on the gap without having weighed it.

Should you trust the sheet title or the specifications?

The specifications. On 25 October, the CW2114 sheet carries "1x3" in its title and shows six cavities in its layout. The CW2053 sheet announces "1x4" and lists five cavities. A title slip is easily made, but it changes the cost per piece.

Brought down to the cavity, the calculation gives 6.93 € for the CW1421, 4.58 € for the CW2053 and 3.82 € for the CW2114. If the CW2053 sheet were right about four cavities rather than five, it would rise to 5.73 €. That is why I always count cavities in the technical table, not in the heading.

Silicone or polycarbonate for a bar?

Polycarbonate if you want the glossy face of a chocolatier's bar. Silicone if you aim for a satin look and a forgiving demould.

The mechanics are the same as for pralines: the rigid wall does not move when tempered chocolate contracts, the piece releases by itself and keeps the polish of the mould. Silicone follows the shrinkage and gives a matt surface. I set it out in our article on the polycarbonate chocolate mould, BPA included.

I quote no price for a silicone mould: I read no official Belgian sheet on 25 October, and a price without a source does not belong in a table. Silikomart states a range of -60 to +230 °C on its professional range, which settles the washing question.

The mould does not rescue a failed tempering

Never.

Badly tempered chocolate stays stuck to the wall, comes out grey or streaked, and the finest mould in the catalogue changes nothing. If your curve is not yet reliable, first read how to temper chocolate, then buy the mould.

Where can you buy a bar mould in Belgium?

In Hoboken, south of Antwerp, at the maker itself. Its Discovery Shop, at Smallandlaan 4, receives private customers like professionals, with no minimum quantity and no appointment. I read it in the house's FAQ on 19 September 2026: the address and the hours (Monday to Friday, 9 am to 5 pm) therefore hold for that date, and a phone call before the trip does no harm.

Quantity discounts are published on the sheets: 20 % from 30 moulds, 30 % from 70, 40 % from 150. For an amateur they are of no use. For a small workshop, it is the first line to read.

Silikomart or Matfer silicone can be found at Belgian pastry equipment retailers.

Can you do without a mould to make bars?

Yes, and it is often my advice. A frame set on a guitar sheet gives a plain, flat, clean bar, for a cost that fits within the price of a single mould. The mould earns its place when you want relief, bars that are all identical and shine on the visible face.

There is also the question of the material. European Regulation 2024/3190 restricts bisphenol A in food-contact materials, and a bar stays in contact for its whole setting time.

If the urge is to taste rather than to mould, our guide to the best Belgian chocolate bars and the ranking set out the order of preference among the houses.