This is a delicious, buttery, shortbread-esque cookie that is perfect for a high tea, dah-ling!  I used some raspberry jam, and did others with strawberry jam.

Ingredients

1 cup butter (no substitutes), softened
1/2 cup sugar
1 egg
1 teaspoon vanilla extract
2 1/4 cups all-purpose flour
1/2 teaspoon baking powder
1/4 teaspoon salt
1/2 cup raspberry jam

GLAZE:
1 cup confectioners’ sugar
2 tablespoons milk
1/2 teaspoon vanilla extract

Directions

In a mixing bowl, cream butter and sugar. Beat in egg and vanilla. Combine the flour, baking powder and salt; gradually add to creamed mixture and mix well.

Divide dough into four portions; shape each into a 10-in. x 2-1/2-in. log. Place 4 in. apart on parchment paper lined baking sheets. Make a 1/2-in. depression down the center of each log. Bake at 350 degrees F for 10 minutes.

Fill depressions with jam. Bake 10-15 minutes longer or until lightly browned. Cool for 2 minutes and cut into 3/4-in. slices.   Leave on cookie sheet until they are completely cool, or they will fall apart.
In a small bowl, combine glaze ingredients until smooth. Drizzle over warm cookies. Cool completely.