Grease a standard rimmed cookie sheet (about 12x17) and set aside.
Cream together butter and sugar on medium speed. Add eggs one at a time, allowing each egg to be incorporated into the mixture. Scrape the sides of the bowl and add vanilla; mix well.
Whisk together salt, baking soda, and flour in a medium bowl. Slowly add to the sugar mixture until just combined.
Press the dough evenly into the greased cookie sheet. Bake at 375° for 15 minutes until lightly golden. Remove from oven and set aside to cool.
Prepare frosting by using an electric hand mixer to beat the butter until smooth. Then add 2 Tbsp milk and almond extract; mix together.
Add powdered sugar about a half cup at a time to avoid a mess. Add 1 Tbsp milk and combine.
Divide frosting into desired amount of bowls. Add coloring to each bowl of frosting and mix well to color it.
Use an egg-shaped cookie cutter and press into baked sugar cookie bars. Remove to frost and decorate as desired.