Soda ash
Making soda ash grants 1 Cooking experience Soda ash can be converted into molten glass without needing any buckets of sand by using a Desert amulet 2 or higher This can be done 50 times a day 100 with a Desert amulet 3 or 150 with a Desert amulet 4 Cooking seaweed into soda ash yields a profit/loss of 72 coins each