1.5 cups cup heavy whipping cream sour room temperature
0.8 teaspoon vanilla
1 teaspoon vanilla extract
Equipment
bowl
baking sheet
oven
whisk
mixing bowl
blender
Directions
Preheat oven to 400 degrees F.In a large mixing bowl, beat butter until creamy.
Add sugar and continue beating until creamy and light.
Add eggs one by one, beating until incorporated. Beat in vanilla, baking soda and baking powder.Stir in the sour cream.
Add the flour and mix until incorporated.Put half the dough in the refrigerator until ready to use.
Roll the remaining dough about 1/4 inch thick and cut into small circles. Arrange on a parchment lined cookie sheet and bake for 12-15 minutes or until cookies are lightly brown around the edges.
Put the whites in the bowl of the standing mixer and begin beating. You can use the paddle or the whisk attachment for this.
Add the butter and shortening and beat on high. Stir in half of the sugar. Beat until creamy, then add remaining sugar and flavorings. Continue beating until light and creamy.