Add a little St. Patrick’s cheer to your baking with Green Buttercream Cookies, glowing emerald with buttery crumb and lightly golden edges for a festive celebration spread.
Are you cooking something special for this St. Patrick’s Day? I’ve got you covered. These Green Buttercream Cookies are so easy to make and look really cute. They would be perfect for a St. Patrick’s Day-themed tea party.
St. Patrick’s Day is celebrated every year on 17 March in honour of Saint Patrick, the patron saint of Ireland. Over time, it became linked with the colour green, shamrocks, and cheerful gatherings filled with food and sweets.
Baking something green is simply part of the fun now. Even if you’re not Irish, it’s hard not to enjoy an excuse to bring a bit of colour into the kitchen.
That’s exactly how these cookies came about. I had some leftover green buttercream sitting in the fridge after decorating cupcakes, and I couldn’t bring myself to throw it away.
Instead of making more frosting-heavy treats, I turned them into biscuits. If you don’t have green buttercream ready, you can mix green colouring into your vanilla buttercream and use that instead.
Why We Love St. Patrick’s Cookies
- Soft centres with lightly crisp bottoms give a satisfying contrast that works for both adults and children.
- Green shade makes them ideal for St. Patrick’s Day, but they also suit birthdays or themed parties with a simple colour swap.
- Buttercream-based dough creates a richer flavour than standard sugar cookies, giving a fuller sweetness with a softer finish.
Key Ingredients for Green Buttercream Cookies
Green Vanilla Buttercream
Brings buttery richness and gentle vanilla sweetness, giving the cookies their soft crumb and lightly crisp edges. American-style buttercream works best here, as its higher sugar content contributes to subtle caramel notes once baked and helps the biscuits hold their shape.
Egg
Adds mild richness and supports a tender interior that stays soft after cooling. Free-range eggs often have deeper yolks, which can slightly influence the final colour and add a rounder flavour.
Plain Flour
Provides structure while keeping the texture delicate rather than cakey. Standard plain flour with moderate protein creates a balanced crumb that stays soft in the centre without becoming heavy.
Find the complete list with measurements in the recipe card below.
How to Make Green Buttercream Cookies
Step 1: In the bowl of an electric mixer fitted with the whisk attachment, beat the leftover buttercream and the egg until well combined.
Step 2: Add the flour and baking soda, then mix until fully incorporated.
Step 3: Drop spoonfuls of batter onto a baking tray lined with baking paper and use a fork to gently press the batter down slightly.
Step 4: Bake in a preheated oven at 175°C – 350°F for about 10 minutes.
Step 5: Let them cool for a couple of minutes, then transfer to a wire rack to cool completely.
Frequently Asked Questions
Yes. Freshly made American-style buttercream works well. Make sure it has a standard butter-to-sugar ratio so the dough holds its shape during baking.
If your buttercream is very soft or high in butter, chill the dough for 15-20 minutes before baking. This firms the fat and reduces spreading, helping the cookies keep a neater shape in the oven.
Any coloured vanilla buttercream works, so you can match them to different occasions or themes. The flavour stays the same, only the appearance changes.
If your buttercream tastes very sweet, mix a small pinch of fine salt into the dough. It balances the sugar and rounds out the vanilla flavour without making the cookies taste salty.
Extra Help from the Kitchen
Use a Cookie Scoop for Even Baking – Portioning the cookie dough with a small cookie scoop keeps each biscuit the same size, which helps them bake evenly and prevents some from drying out before others are done.
Check the Underside Colour – Since the tops stay green, the easiest way to judge doneness is to lift one gently and look at the base. A light golden colour underneath means they are ready to come out.
Tap the Tray to Release Air Bubbles – After you press the dough down with a fork, tap the baking tray gently on the counter once or twice. This releases trapped air bubbles and helps create a smoother surface with an even crumb.
Avoid Over-Flouring the Dough – Buttercream already contains sugar and fat, so adding excess flour can make the cookies dry rather than soft. The dough should feel soft and slightly sticky, not stiff.
Use Light-Coloured Baking Trays – Dark trays can brown the bottoms too quickly. A light or aluminium tray helps keep the base golden rather than too dark, while the centres stay soft.
Variations and Twists
Add Gold Sugar Sparkle – Sprinkle a little gold sanding sugar over each cookie after pressing with a fork. As they bake, the sugar settles into the surface and leaves a fine crisp layer with light caramel flavour.
Fold in Mini Chocolate Chips – Stir in 50 g – 1.8 oz mini dark or white chocolate chips before shaping the dough. Small chips distribute more evenly and give soft chocolate pockets throughout.
Add an Extract for Extra Flavour – Stir ¼ teaspoon of a high-quality extract, such as vanilla extract, almond extract, or peppermint extract, into the buttercream before adding the egg so the flavour spreads evenly through the mixture.
Press in Festive Sprinkles – Gently press green and white nonpareils onto the tops before baking. They add colour and a slight crunch once baked.
Storage and Shelf Life
Store Green Buttercream Cookies in an airtight container at room temperature for up to 5 days. Keep them in a cool, dry place and separate layers with baking paper to prevent sticking.
If needed, store them in the refrigerator for up to 7 days in a sealed container. Allow them to come back to room temperature before serving for a softer texture.
For longer storage, freeze the fully cooled cookies in a sealed freezer-safe container for up to 3 months. Place baking paper between layers to prevent them from sticking together.
Thaw at room temperature for 1 to 2 hours before serving. If you prefer a slightly crisp exterior, warm them briefly in a 160°C – 320°F oven for 3 to 4 minutes, then allow them to cool for a few minutes before serving.
Green Buttercream Cookies Recipe
Ingredients
- 480 ml – 2 cups green vanilla buttercream – at room temperature
- 1 egg
- 250 g – 2 cups plain flour
- 5 ml – 1 tsp baking soda
Instructions
- In the bowl of an electric mixer fitted with the whisk attachment, beat the leftover buttercream and the egg until well combined.
- Add the flour and baking soda, then mix until fully incorporated.
- Drop spoonfuls of batter onto a baking tray lined with baking paper and use a fork to gently press the batter down slightly.
- Bake in a preheated oven at 175°C – 350°F for about 10 minutes.
- Let them cool for a couple of minutes, then transfer to a wire rack to cool completely.
Notes
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