Sift together flour, baking soda ... tartar. Cut in butter as you would when making ... eggs and add sugar and vanilla. Combine the two ... Makes about 3 dozen.
In the large mixing bowl ... mixer, beat together sugar, butter, egg yolks, salt and ... the end. Arrange cookies on parchment-lined or ungreased baking ... thicker than for piping.
Measure cereal into a large ... white and brown sugar, stirring well. Slowly bring ... vanilla and peanut butter. Mix well and pour ... part of the cereal.
Preheat oven to 350°F. In ... well combined. Beat butter until light and fluffy, gradually adding white sugar. Beat in brown sugar ... top of the cookies. Bake at 350°F 10-12 ... the M&M's, if desired.