Small bear would have been thicker. It was in effect a food source for much of Europe, particularly in England where everyone in the peasantry drank it at every meal (water was generally not safe to drink, and wine was expensive).
I'm afraid that's wrong, old chap.
Small beer was a (relatively) weak brew which was alcoholic enough to be safe to drink in place of water.
The brewing process goes like this:-
1. Kiln germinating malt and bash it up. The length of time kilning (and the fuel over which it is kilned) will lend colour and taste to the final brew. You need to let the malt germinate a bit before kilning it so that there is maximum starch.
2. Mash the malt in hot water and keep the temperature steady at about 70 for an hour or so. This is the porridgy stage - you mix the malt with sufficient hot water so that it looks like the lumpen, evil twin of Ready Brek. This mashing process converts the starch into sugar.
3. Run the liquid (called wort) out of the mashing vessel. This liquid will be hot, sweet and beer coloured.
4. Top the wort up with water to reach the final desired gravity and volume level and boil it up with hops etc for a couple of hours.
5. Cool it down, get some air back into the liquid, pitch the yeast, ferment it then rack it off for maturation.
6. Enjoy responsibly.
Now, stage 3 is where small beer comes in. Nowadays, brewers tend to run more hot water through the bed of damp grain that is left when the wort is run off. This process is known as sparging and is designed to wash the grains clean, ensuring that maximum wort ends up in the boiler.
In the past, sparging was less common. Instead, once the wort had been run off, more hot water was added and the grains were remashed. Obviously, there is less potentially fermentable material in there, so the resulting, second brew would be weaker than the first one.
This process of reusing the grain was called "striking" and would result in a whole series of brews of increasingly weak beer. It was not uncommon to strike four or more times. What you would then get would be four brews as follows:-
1. First strike - a very, very strong, premium brew not unlike a modern stout in terms of consistency (although not colour - mucky brown tended to be de rigueur until the Burton brewers stumbled across Pale Ale). First strike ales commanded a high price and were often seen as a luxury item.
2. Second strike - a still pretty strong, but very much secondary brew. You might keep that one for yourself for high days and holidays.
3. Third strike - table beer. Sometimes called Kitchen Ale or Amber Kitchen Ale (AKA). As the name suggests, you gave this to the servants.
4. Fourth strike - small beer. Relatively weak, therefore ideal for everyday drinking in place of water and giving to the kiddies.
Of course, fashions and habits change and it is perfectly possible to produce any of the above brews without striking - you simply use less fermentable material for weaker brews.
There were other ways of getting tanked up - furmity springs to mind. Mouse might know better as a fully paid up Westcountry rodent, but I think that sort of thing was thick and porridgy. But it was a recipe to which you added booze - not a means of fermenting booze in the first place. You could doubtless use small beer in the same way - mix it up with other ingredients - but the beer itself was very much a liquid.
Regards,
Peter