In a large bowl, cream butter and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition. Beat in extracts. Combine the flour, baking powder and salt; gradually add to creamed mixture and mix well. Stir in almonds. , Line a baking sheet with foil and grease the foil. Divide dough in half. On the foil, form each portion into an 11x3-in. rectangle. , Bake at 300° for 35 minutes or until lightly browned. Carefully remove to wire racks; cool for 15 minutes. Increase heat to 325°., Transfer rectangles to a cutting board; cut diagonally with a serrated knife into 3/4-in. slices. Place cut side down on ungreased baking sheets. , Bake for 10 minutes. Turn and bake 10 minutes longer or until firm. Remove to wire racks to cool completely. Store in an airtight container.