Grandma's Classic No-Bake Cookies

Ingredients (7)

• + 2 cups white sugar add to pantry
• ✓ ½ cup milk
• ✓ ½ cup unsalted butter
• + 2 tablespoons cocoa powder add to pantry
• + 3 cups old-fashioned oats add to pantry
• + ½ cup peanut butter, or more to taste add to pantry
• + 1 teaspoon vanilla extract add to pantry