Grandma's Classic No-Bake Cookies

Ingredients (7)

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