Open a crafting table
Place 2 sticks in the middle column, one in the center and one below it
Place 3 matching materials across the top row
Use wooden planks for a wooden pickaxe
Use cobblestone for a stone pickaxe
Use iron ingots for an iron pickaxe
Use gold ingots for a gold pickaxe
Use diamonds for a diamond pickaxe
Take the pickaxe from the result slot