The Prettiest Pi Day Pie: a yearly 'constant' celebration

It’s time to serve up a tasty slice of Pi Day pie.

Maybe it’s been a few months since your last pie and you’re looking for an excuse to get out the old rolling pin. Or maybe you love math and are dying to pay homage to this constant – the ratio of the circumference of a circle to its diameter. Or maybe you just appreciate a good homophone. Whatever the reason … TOMORROW IS Pi DAY!

Steps for making Pi day pie via @kingarthurflourMarch 14 is an unofficial celebration of Pi(e) around the world, and so is this #PiDay pie! Click To Tweet

Pi (Greek letter “π”) is the mathematical symbol used to represent the ratio of the circumference of a circle to its diameter, which is approximately 3.14159. Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely (like our love of pie) without repetition or pattern.

Our Decorative Pie Crust Tips post blew us and our readers away with its detail. So again, we turned to expert Toronto baker Samantha Chiu (of Instagram fame) for inspiration and her best tips on Pi(e) Day crust perfection.

And she did not disappoint! This pie-tastic masterpiece has us excited to celebrate. Come along with us to see how she does it!

Pi Day pie

Steps for making Pi day pie via @kingarthurflour

Step 1: Pie dough and filling

Make a batch of your favorite Double Crust Pie dough, divide it into two pieces, flatten each into a disc, and refrigerate for 30 minutes.

Stir together the ingredients for your favorite fruit filling, like apple, blueberry, or cherry.

Steps for making Pi day pie via @kingarthurflour

On a well-floured surface, use a rolling pin to roll one disc into a circle large enough to properly fill the pie pan; typically we suggest 13″. Transfer the dough to a 9″ pie pan. Watch this video for tips on how to move your rolled dough. 

Spoon the prepared fruit filling into the crust-lined pan. 

Steps for making Pi day pie via @kingarthurflour

Step 2: Make a lattice top

Roll the second dough disc into a circle. Make sure the dough is chilled; cutting lattice strips is much easier with cool dough than warm.

Use a knife and ruler (optional, but helpful) to cut 1/2″-wide strips — you’ll need 17 strips.

Steps for making Pi day pie via @kingarthurflour

Start weaving by placing dough strips under and over each other. Once all the dough strips are woven and their edges trimmed, the pie should look like this:

Steps for making Pi day pie via @kingarthurflour

Step 3: Bake the pie

Brush the crust with egg wash (1 large egg beaten with 1 tablespoon water). Top with sparkling sugar, if you like. Bake the pie for the recommended time and temperature in the recipe.

Steps for making Pi day pie via @kingarthurflour

Step 4: Pi-tastic numbers

Make numbers using leftover pie dough scraps.

Create a paper template by tracing an outline of the numbers onto a piece of paper and cutting out the shape. Use a knife to trace the paper template onto the pie dough. Alternatively, use number cookie cutters.

Bake your cutout numbers on a parchment-lined baking sheet for about 15 to 18 minutes, until they’re golden brown. Baking numbers separate from the pie ensures they won’t over-bake, as they need less time in the oven than the pie.

Remove the numbers from the oven. Once cooled, sprinkle them with confectioners’ sugar, for visual pop.

Steps for making Pi day pie via @kingarthurflour

Step 5: Show off and celebrate!

Arrange the numbers atop the cooled pie. If you’re going to be moving the pie around quite a bit and need the numbers to stay in place, add just enough water to some confectioners’ sugar to make a soft paste; “glue” the numbers to the crust with this sugar paste.

Serve Pi Day pie with vanilla ice cream!

There you have it, a Pi Day pie stunning enough to grace any table on 3/14.

Try it yourself: Use our Pie Crust Guide for helpful hints and recipes (our Complete Guide to Pie Baking and How to: pie playlist have even more inspiration!). Then share your results with us on Facebook, Twitter, or Instagram, using #kingarthurflour.

Gwen Adams

Gwen Adams grew up in northern New Hampshire, on top of a mountain, surrounded by nature and not much else. After graduating from Lyndon State College in 2010, Gwen sought a career that combined her passion for writing with her love of baking. She found ...


  1. Marideth

    We’re making a chocolate-cherry pie with whipped cream on top, and using dark chocolate symbols instead. Melt the chocolate and pipe onto parchment paper, then peel off carefully and place onto the pie. To help keep your numbers even, put the paper or plastic wrap over a printed out template.

  2. nancy

    Already posted this under someone else’s post about 7″ pie pans. But in case it’s missed:

    I’m a household of one and I LOVE to bake. My solution to making too much pie (or muffins, cookies, cake, etc) is to SHARE with my neighbors and friends. They love getting treats, and I like not feeling obligated either to eat way too much or else letting things get stale or soggy. It’s a great solution. Builds relationships. A win-win, in my book.

  3. Bettye Owens

    Anchor Hocking makes 6″ glass pie pans. I purchased mine at the local Williams Sonoma. There are lots of recipes in cooking and/or baking ‘for one or two’ magazines.

  4. John L Cofer

    Has anyone thought of coming up with a pie recipe where the ingredients followed PI? For example, 3 parts apple, 1 part sugar, 4 parts blueberry, 1 part cinnamon, 5 parts blackberŕy, etc. I’m not a cook so these proportions may sound terrible, but you get the idea. You could even call it a PI-Everything pie?

  5. Marcia

    Fiesta makes small pie plates in their beautiful colors perfect for singles and couples. I have different colors for the different pies I make.


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