Vanilla Bean St. Patrick's Day Cookies

Make Vanilla Bean St. Patrick's Day Cookies: tender vanilla-scented shamrock cookies with creamy vanilla bean buttercream.

Ingredients

• 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled), plus more as needed for rolling and work surface
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) granulated sugar
• seeds scraped from 1 whole vanilla bean*
• 1 large egg, at room temperature
• 2 teaspoons pure vanilla extract
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• seeds scraped from 1/2 of a vanilla bean*
• 3 cups (360g) confectioners’ sugar, sifted (sift after measuring)
• 3 Tablespoons (45ml) heavy cream, half-and-half, or whole milk, at room temperature
• 1 and 1/2 teaspoons pure vanilla extract
• salt, to taste
• optional: gel food coloring for tinting
• optional: sprinkles for decorating

Instructions

Step 1: Whisk the dry ingredients

Whisk the all-purpose flour, baking powder, and salt together in a medium bowl until evenly combined and aerated. This light, dry mix will give the cookies a tender crumb and is the foundation for the dough, so fluff and sift gently with a whisk to remove lumps and distribute the leavening.

Step 2: Cream butter, sugar, and vanilla

In a large, sturdy bowl beat the softened unsalted butter with the granulated sugar on high speed until pale and airy, about three minutes. Add the scraped vanilla bean seeds and continue beating until the speckled butter is creamy and smooth. Add the room-temperature egg and pure vanilla extract, incorporating fully so the mixture becomes glossy and slightly springy.

Step 3: Combine into a uniform dough and roll thin

Add the dry mixture to the butter mixture and stir on low until a soft, slightly tacky dough forms; if it feels overly sticky, fold in a tablespoon more flour. Divide the dough into two equal portions and place each portion on lightly floured parchment. Using a lightly floured rolling pin, roll each piece to an even 1/4-inch thickness, keeping the surface and dough well floured to prevent sticking.

Step 4: Stack, chill, and prepare for cutting

Lightly dust the top sheet of one rolled dough with flour, place a second piece of parchment on top, then stack the second rolled dough on top. Cover the stacked sheets with plastic wrap and refrigerate for at least 1–2 hours (or up to 2 days) until firm but still pliable. Chilling firms the butter, firms the layers for cleaner cookie edges, and concentrates the vanilla flavor.

Step 5: Cut, bake, and cool

Once chilled and slightly firm, remove the stack and peel away the top parchment. Using cookie cutters, stamp shamrock shapes from the dough on a lightly floured surface, re-rolling scraps as needed. Arrange shaped cookies about 3 inches apart on parchment-lined baking sheets and bake at 350°F (177°C) until edges are just turning light golden, about 11–12 minutes. Let them rest on the sheet 5 minutes before transferring to a wire rack to cool completely.

Step 6: Make the vanilla bean buttercream

Beat softened butter with the scraped vanilla bean seeds until very creamy, then add sifted confectioners’ sugar, heavy cream, and vanilla extract. Start on low to avoid a sugar cloud, then increase to medium-high and whip until silky and spreadable. Taste and add a pinch of salt if overly sweet. Divide the frosting into bowls and tint with tiny drops of gel food coloring to achieve multiple shades of green if desired.

Step 7: Frost and decorate the cooled cookies

Once cookies are completely cool, pipe or spread the buttercream onto each cookie—the pictured approach uses a dual-filled piping bag to create two-tone leaves: three small piped hearts for the shamrock leaves and a thin piped stem. Finish with sprinkles, nonpareils, or a light dusting of edible glitter. Store frosted cookies covered at room temperature for up to one day or refrigerate for up to one week.

Notes

• Chill the dough for at least 1 hour to get crisp, clean cookie edges.
• Use real vanilla beans for the best aromatic flavor; vanilla extract works in a pinch.
• Freeze baked cookies flat, then stack to save space; thaw before frosting.