Jam puff pastry dessert triangles are the kind of recipe that sneaks into your life on an ordinary afternoon and somehow becomes a forever favorite.

I first discovered them on a rainy Sunday, the kind of day that begged for comfort food and a warm oven. My husband and I had been puttering around the house, both a little restless, when he looked at me with that familiar grin and said, “Got anything sweet hidden away?”

Now, I didn’t feel like embarking on a full baking project. But there, tucked in the freezer, was a packet of puff pastry. And in the fridge? A half-used jar of raspberry jam that was begging for some love.

Within minutes, I was rolling, spooning, folding, and sealing. By the time the oven filled the kitchen with that unmistakable scent of buttery pastry and bubbling jam, my husband was already hovering like a kid waiting for cookies. We pulled them out golden, flaky, and just a little rustic—but after the first bite, we both knew this was a keeper.

Since then, these jam puff pastry dessert triangles have become our quick-fix treat for cozy nights in, last-minute guests, or those moments when you just need something sweet with your coffee. No fuss, no stress, just pure pastry joy.

Why You’ll Fall in Love with These Little Triangles

Ridiculously easy – If you can fold paper into a triangle, you can make these.
Customizable to your cravings – Any jam, any time.
Light, flaky, and slightly sweet – Just enough to satisfy your dessert tooth without sending you into sugar shock.
Perfect for sharing – Make a whole tray in 20 minutes flat.
No fancy equipment – Just your oven, a baking sheet, and a spoon.

They’re the kind of treat that feels like a warm hug, and looks fancy enough to serve to guests—even if your guests are just you and your 3rd cup of coffee.

Easy Jam-Filled Puff Pastry Dessert Triangles

Ingredients

1 package puff pastry sheet (about 250 g / 9 oz)
About ½ cup (120 g) bake-stable jam (your favorite flavor!)
Powdered sugar, for dusting

Instructions

1. Prep the puff pastry

Preheat your oven to 200°C (400°F), fan-forced/convection setting.
Roll out your puff pastry on a flat surface (lightly floured if needed).
Cut into even squares about 6–7 cm (2.5 in) each.

2. Add the filling

Spoon about 1 teaspoon of jam into the center of each square.
Don’t overfill—tempting, I know—but too much jam will burst out during baking.

3. Fold and seal

Fold each square diagonally into a triangle.
Press edges firmly together.
For extra security (and fewer leaks), fold the edges inward slightly and pinch tightly.

4. Bake

Place triangles on a parchment-lined baking tray.
Bake for about 10 minutes, or until golden and puffed.
Oven times vary—keep an eye out for that golden color.

5. Cool and dust

Let them cool completely.

Dust generously with powdered sugar right before serving.

Variations & Substitutions

Jam & Fruit Combos

Apricot jam + chopped almonds
Strawberry jam + tiny chocolate chips
Plum jam + cinnamon dust
Blueberry jam + lemon zest

Sweet Twists

Add a dab of cream cheese under the jam for a cheesecake-y vibe.
Swap jam for Nutella or peanut butter + banana slices.
Go savory with feta + spinach or ham + Dijon mustard.

Dietary Swaps

Vegan puff pastry + plant-based jam for a dairy-free option.

Gluten-free puff pastry for a coeliac-friendly version.

Sugar-free jam if you’re watching sugar.

Packing Tips: Lunchboxes & On-the-Go Treats

These travel surprisingly well!

For kids’ lunchboxes:

Wrap in parchment or pop into a silicone snack cup.
Pair with cheese cubes or yogurt for balance.

For adult snack stash:

Slip into a sealed sandwich bag.
Perfect with coffee or tea at your desk.

Great for picnics, potlucks, and road trips too.

Healthy Tips & Nutrition Notes

Use fruit-only jam without added sugar.

Great for little ones when paired with milk or fruit.

Serve with Greek yogurt or fresh fruit for balance.

Make mini bite-sized versions for portion control.

Wrapping It Up

These jam-filled puff pastry triangles are everything I love in a dessert:

They look fancy but take almost no effort.
They turn simple ingredients into something crave-worthy.
They fit any occasion, from lazy Sundays to holiday trays.

They’re flaky little envelopes of joy that never disappoint. Keep puff pastry and jam on hand, and you’ll always have a sweet escape ready in minutes.

Try These Next

If you loved this recipe, don’t miss these other quick favorites:

And follow me on Pinterest where I share all my newest recipes and snackable shortcuts.

Jam-Filled Puff Pastry Dessert Triangles

Jam puff pastry dessert triangles are the kind of recipe that sneaks into your life on an ordinary afternoon and somehow becomes a forever favorite.

Why You’ll Fall in Love with These Little Triangles

Ridiculously easy – If you can fold paper into a triangle, you can make these.
Customizable to your cravings – Any jam, any time.
Light, flaky, and slightly sweet – Just enough to satisfy your dessert tooth without sending you into sugar shock.
Perfect for sharing – Make a whole tray in 20 minutes flat.
No fancy equipment – Just your oven, a baking sheet, and a spoon.

They’re the kind of treat that feels like a warm hug, and looks fancy enough to serve to guests—even if your guests are just you and your 3rd cup of coffee.