Our DIY oven-baked clay coasters are such a fun craft and functional too! Pick clay in your favorite colors then create a pretty marbled design—no two are the same.

The trick to having this craft turn out well the first time is to work on a clean surface. Once your workspace is sufficiently clean, protect it with a layer of parchment paper so the clay doesn’t stain your countertop.

We used a convection oven, which baked the clay quickly—so make sure you keep an eye on the prize so it doesn’t overcook. If you bake the coasters too long, the colors will darken and won’t turn out as vibrant.

How to Make Clay Coasters

How to Make Clay Coasters
  • parchment paper
  • 1.7 oz pkg oven bake clay for main color
  • 2 – 1.7 oz pkgs oven-bake clay, different colors
  • rolling pin
  • 3.5″ jar lid
  • precision knife
  • sandpaper
  • brush
  • metallic gold paint
  • acrylic glaze
  1. Preheat oven to 275 degrees then clean and protect work surface with parchment paper.
  2. Using your palms, unwrap and squeeze the entire package of clay you selected as the main color. Shape it into a ball then place it on your work surface to roll it into a log.
  3. Repeat with each of the two accent colors but only use one of the four sections in each package.
  4. Place the 3 logs side by side then twist together 5–6 times to form one piece. Fold in half then twist again—just enough to give it a swirled look.
  5. Shape the clay into a ball then use a rolling pin to spread and flatten it about ⅛” thick.
  6. Press the jar lid firmly onto the clay. Trace and cut around the lid using a precision knife. Repeat for each coaster then remove excess clay and sand the edges smooth.
  7. Bake clay on a parchment-lined baking sheet approximately 20 minutes, until it hardens.
  8. Once coasters are cool, use a brush to paint a ¼”-wide metallic border along the top edge. Be sure to cover the side edge too. Allow it to dry completely before applying a coat of acrylic glaze.
Oven-baked clay comes in different-sized packages but the size found most often is 1.7 oz.

DIY oven baked clay coasters