Heineken (Rotterdam) grists in 1941

The grists hadn’t really changed since 1940. The beers are still all malt, save for a little caramel colouring. This is a real contrast with the UK, where by this point all brewers had been forced to use some unmalted grain. The move wasn’t just about preserving grain supplies. Labour shortages meant that there was limited malting capacity.

I’m not sure why the kleurmout and caramel have been dropped from Beiersche. I would have expected that they would struggle to get the colour dark enough without those two elements. According to the brewing records, it is a little paler, but only by a small amount. Probably too little for drinker to notice.

Heineken (Rotterdam) grists in 1941
Date	Beer	Style	lager malt	Kleur-mout	broei-mout	Caramel-mout	litres Kleur
17th Jul	Pils	Pils	100.00%
16th Jul	Donker Lagerbier	Donker Lagerbier	90.50%	1.50%	6.00%	2.00%	24
17th Jul	Licht Lagerbier	Licht Lagerbier	100.00%
15th Jul	Pils	Pils	100.00%
16th Jul	Beiersche	Münchener	91.88%		6.09%	2.03%
Source:
Heineken brewing record held at the Amsterdamse Stadsarchief, document number 834 - 1760.