These are small, free-form lemon custard tarts with fresh thyme stirred into the filling. The thyme doesn’t shout — it just takes the edge off the lemon’s sharpness and leaves a faint herbal note that makes people ask what’s in them. At under an hour start to finish, they’re a genuinely manageable bake that produces something you’d actually want to serve to guests.
Substitutions that actually work
- Heavy cream: Coconut cream works as a straight swap and keeps the filling set. Full-fat only — light coconut milk is too thin and the custard won’t firm up properly.
- Fresh thyme: This is the one ingredient worth tracking down fresh. Dried thyme turns dusty and bitter in a baked custard. If you genuinely can’t find fresh thyme, a teaspoon of finely chopped fresh rosemary is an interesting alternative — different flavor, but it works with lemon.
- Lemon juice: Use freshly squeezed. Bottled juice is noticeably flatter here because the filling is simple enough that every ingredient shows.
The short version of why this works
Two things carry this recipe. First, blind-baking the shells before adding the filling gives you a crust that stays crisp rather than turning soft under the custard — skip that step and you’ll have a soggy base no matter how carefully you bake. Second, the filling ratio of eggs to cream to juice is calibrated to set firmly at 350°F in 15 minutes; pulling the tarts when the edges are just golden and the center has a very slight wobble is the right call, because residual heat finishes the job as they cool. Overbaking makes the custard grainy.
Mistakes to avoid
- Rolling the dough straight from the fridge: After chilling, let it sit for 3–4 minutes on the counter. Dough that’s too cold cracks at the edges when you roll it, and those cracks let filling leak through during baking.
- Skipping the fork-pricking step: If you don’t dock the bottoms, steam lifts the pastry and you get uneven, puffed shells that are hard to fill evenly. Press the tines all the way through.
- Adding the filling to hot shells: Let the blind-baked shells cool for at least 5 minutes before pouring in the custard. Hot pastry can cause the egg mixture to start cooking unevenly before it even goes back in the oven.
- Chopping the thyme too coarsely: Larger pieces don’t distribute evenly, so some bites taste herbal and others don’t. A fine chop takes an extra minute and makes a real difference — skip the garnish of whole thyme sprigs on top though, not worth the extra dish.
- Overmixing the filling: Whisking too vigorously incorporates air bubbles that show up as small craters on the surface once baked. Whisk just until the eggs and sugar are fully combined and the mixture looks smooth.
Rustic Lemon Thyme Tarts
Equipment
- Mixing Bowl
- Whisk
- Rolling pin
- Tart Pans
- Oven
- Microplane Zester
Ingredients
For the Crust:
- 1 ¼ cups all-purpose flour preferably organic
- ½ cup unsalted butter chilled and diced
- ¼ cup granulated sugar
- 1 large egg preferably free-range
For the Filling:
- ¾ cup freshly squeezed lemon juice from about 4 lemons
- 1 tablespoon lemon zest zest from organic lemons
- 3 large eggs
- ¾ cup granulated sugar
- ½ cup heavy cream
- 1 tablespoon fresh thyme leaves finely chopped
Instructions
For the Crust Preparation:
- In a mixing bowl, combine the flour and sugar. Add the chilled butter and use a pastry cutter or your fingers to blend until the mixture resembles coarse crumbs.
- Add the egg and mix just until the dough comes together. Form into a disc, wrap in plastic and refrigerate for 15 minutes.
For the Tart Shells:
- Preheat the oven to 350°F (175°C). Roll out the dough on a floured surface to about 1/8 inch thick. Cut and press into tart pans. Prick the bottoms with a fork and bake for 10 minutes, or until lightly golden.
For the Filling Preparation:
- In a bowl, whisk together lemon juice, lemon zest, eggs, sugar, and cream until well blended. Stir in chopped thyme.
For the Baking the Tarts:
- Pour the filling into the pre-baked shells. Bake for 15 minutes, or until the filling is set and slightly golden around the edges.
Notes
- Ensure all ingredients are at room temperature for smoother mixing.
- For a non-dairy option, replace heavy cream with coconut cream.
Nutrition
Frequently asked questions
Can I make the dough ahead of time?
Yes — the dough keeps well in the fridge for up to two days, tightly wrapped. You can also freeze it as a disc for up to a month; thaw it overnight in the fridge before rolling.
How do I know when the filling is actually set?
Give the pan a gentle nudge at the 15-minute mark — the edges should be firm and the very center should have just a slight jiggle, similar to a just-set Jell-O. It will finish firming up as it cools, so don’t wait for it to look completely solid in the oven.
Can I bake these in a muffin tin instead of tart pans?
A standard muffin tin works fine if you don’t have tart pans. Press the dough up the sides about three-quarters of the way, dock the bottoms, and reduce the blind-bake time by about 2 minutes since the walls are thicker and hold heat differently.
Can I make these a day before serving?
Yes, and they actually slice more cleanly after a night in the fridge. Store them uncovered or loosely tented — airtight wrapping traps condensation and softens the crust.
If you liked this one
- Lemon Thyme Shortbread Bars
- Mediterranean Sunshine Lemon Crumble Bars
- French Brown Butter Chocolate Tart
- Provence-Inspired Lavender Honey Panna Cotta