The former.
Should I lump them in with regular brews or make a new category for custom brews? Here are all of the new brew articles:
Snow Burst & Trail, Swim Speed, Ender Inhibition, Moonshine, Part water, Extinguish Fires, Dissipate Brew Gas, Grow flowers, Fertilize, Harvest, Till land, Planting, Prune Leaves, Fell tree, Pulverize rock, Grow lily, Tint skin, Combustion, Wolfsbane, Part lava, Repell attacker, Brew gas immunity, Poison, Regeneration, Fast movement, Slow movement, Water breathing, Resist fire, Night vision, Invisible, Damage boost, Weakness, Heal, Harm, Floating, Jump, Slow fall, Reflect arrows, Attract arrows, Poison weapon, Bat burst, Air hike, Pull, Erosion, Level Land, Webs, Vines & Flamable, Cactus & Thorned, Sprouting, Freeze, Knockback, Undeadbane, Insectbane, Grow rowan, Grow alder, Grow hawthorn, Grow dark oak, Grow oak, Grow spruce, Grow birch, Grow jungle, Grow acacia, Remove Buffs, Remove debuffs, Endless Water, Flames, Fear, Blindness, Love, Paralysis, Disease, Brew bottling, Insanity, Sinking, Overheating, Nightmare, Frog's Leg, Absorbsion, Health boost, Wasting, Fullness, Revealing, Volatility, Stout belly, Blight, Transpose, Transpose ore, Raise dead, Raise land, Grue's Prey, Absorb magic, Wither, Harm Werewolves, Inferno, Blast, Poison Toad, Ice World, Ice shell, Reflect damage, Demonbane, Undead's Curse, Ill Fitting, Reincarnate, Duration Boost, Resizing, Steal buffs, Fortune, Drain magic, Keep inventory, Shifting seasons, Spread debuffs, Keep effects, and Summon Leonard.
Much like Ars Magica there are also shapes and power addons but those can be quickly described in each of the above articles as a side note.