Preheat your oven to 350°F (175°C). Ensure you have clean, bare, ungreased metal baking sheets ready. Do not use parchment paper.
In a large mixing bowl, beat the softened butter and granulated sugar together on medium-high speed for about 2 minutes until light, smooth, and creamy.
Add the room-temperature egg, vanilla extract, and almond extract (if using). Beat on low speed just until seamlessly combined.
In a separate bowl, whisk together the all-purpose flour and the salt.
Gradually add the dry flour mixture to the wet butter mixture, mixing on low speed strictly until a soft dough forms. Do not overmix.
Fit your cookie press with your desired decorative disc (such as a tree, wreath, or star). Fill the barrel with dough according to the manufacturer's instructions.
Hold the press completely flat against the cool, bare metal baking sheet. Press the dough out, leaving about 1 inch of space between each cookie.
Lightly sprinkle the unbaked dough with red or green colored sugar and festive sprinkles.
Bake on the center rack for 7-9 minutes, just until the cookies are set and the bottom edges begin to turn a very pale golden color.
Let the baked cookies rest on the hot pan for exactly 2 minutes before using a thin spatula to carefully transfer them to a wire rack to cool completely.