Get Ready to Bake: First, preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper – this makes cleanup a breeze!
Cream the Goodness: In a large mixing bowl, combine your softened butter, sugar, and almond extract. Beat them with a mixer on medium speed until the mixture is beautifully creamy and light. This creates that lovely shortbread texture.
Mix Dry Essentials: In a separate medium bowl, simply whisk together the flour and kosher salt. This ensures all the flavors are evenly spread throughout.
Form Your Dough: Slowly add the dry flour mixture into the creamy butter mix. Stir gently until everything just comes together into a nice dough. Be careful not to overmix! Then, gently fold in the sprinkles to add a festive pop of color.
Roll and Cut Hearts: Lightly flour your work surface and roll out the dough to about ¼ inch thick. Grab your mini heart cookie cutter and press out charming heart shapes. Carefully place these little hearts onto your prepared baking sheets, leaving a little space between each.
Bake to Perfection: Pop your cookie sheets into the preheated oven and bake for 8-10 minutes. Watch for the edges to turn a light golden brown – that's when they're perfectly done! Let them cool on the baking sheets for a few minutes before moving them to a wire rack to cool completely.
Whip Up the Icing: While the cookies cool, whisk together the powdered sugar, milk, and clear vanilla extract in a small bowl. Aim for a smooth, pourable consistency. Add a tiny bit more milk if it's too thick.
Decorate with Love: Once the cookies are fully cooled, drizzle your light icing over each one. While the icing is still wet, generously sprinkle with the extra Valentine’s Day nonpareils.
Set and Enjoy: Allow the icing to fully set before serving. Once firm, your adorable and delicious Valentine's Shortbread Cookie Bites are ready to be shared with someone special!