1-First Step: Prepare the mise en place
Preheat your oven to 350°F and line two baking sheets with parchment paper. This prevents sticking and ensures even baking for your christmas tree cookies. Gather the 15.25-oz box vanilla cake mix, 1/2 cup softened unsalted butter, 2 large eggs, 1 tsp vanilla extract, and green gel food coloring. Measure everything out to stay organized, especially if adapting for vegan with flax eggs.

2-Second Step: Mix the dough
In a large bowl, beat the softened butter with a hand mixer until creamy, about 1 minute. Add the eggs and vanilla extract, mixing until smooth. Pour in the cake mix and a few drops of green food coloring, stirring until a soft dough forms. If sticky, add 1/4 cup flour. For gluten-free, use a 1:1 blend here. Knead gently for 1-2 minutes. The dough should be vibrant green, like a fresh tree.

3-Third Step: Chill the dough
Wrap the dough in plastic and chill in the fridge for 30 minutes. This firms it up for easy rolling, preventing tears. Use this time to prepare decorating tools like piping bags. Vegan dough might need 45 minutes extra chilling for best results.

4-Fourth Step: Roll and cut the cookies
Flour a surface lightly and roll dough to 1/4-inch thickness. Use a 2-inch Christmas tree cookie cutter to cut shapes, re-rolling scraps once. Place 2 inches apart on sheets. This yields about 24 pull apart christmas tree cookies. Press gently for clean edges.

5-Fifth Step: Bake the cookies
Bake at 350°F for 10-12 minutes until edges firm but centers soft. They firm as they cool, keeping that cake texture. Rotate sheets halfway for evenness. Cool on sheets 5 minutes, then transfer to racks. Low-calorie version: bake 1 minute less for softer bite.

6-Sixth Step: Make the icing
Whisk 2 cups powdered sugar with 2-3 tbsp milk until smooth. Divide into portions: tint one green for garlands, one yellow for stars, add red for dots. Spoon into piping bags. For dairy-free, use almond milk.

7-Seventh Step: Decorate your mini tree cookies
Pipe green garlands across cooled cookies in zigzag. Add red sprinkle ‘berries,’ yellow star icing toppers, and colorful sprinkles as lights. Place star candies at peaks. Let set 15 minutes. Add almond extract to dough for pine flavor if desired.

8-Final Step: Finishing touches and serving
Arrange on platters for cookie swaps or parties. These easy christmas tree cake cookies travel well. Total time: 1 hour. Store as noted below. Perfect for kids’ parties, less crumbly than sugar cookies.