These are truly a Christmas time and year round favorite among the many cookies that I enjoy baking. I came across this recipe years ago and haven't stopped making them since. Personally, I wouldn't vary anything, they are perfect the way they are.
In a large bowl, on high-medium speed beat butter for 30 seconds. Add the granulated sugar, baking powder, and salt. Beat until combined, scraping sides of bowl occasionally. Beat in egg, milk, almond extract and vanilla. Beat in flour and 1 1/2 teaspoons of the lemon peel. Cover and chill dough 2 hours.
Place spreadable fruit in a small bowl and give a stir to break up. On a lightly floured surface, roll dough to a 12x10-inch rectangle. Spread with fruit. Roll up dough starting with the other long side; pinch edges to seal. Cover and chill 1 hour, turning dough occasionally.
Slice dough into 1/2-inch thick slices. Place 1 inch apart on parchment lined cookie sheets. Bake at 375 degrees for about 10-12 minutes or until edges are set and bottoms are lightly browned. Remove from oven and let cool completely.
For icing, combine powdered sugar, lemon juice and remaining lemon peel. Drizzle over cookies and sprinkle with almonds.
They can be stored at room temperature for 3 days or freeze up to 3 months.