In a saucepan, melt butter over low heat. Remove from heat and add 1 cup chips. Let stand, without stirring, to soften chips.
In a bowl, beat eggs until foamy. Add sugar; beat until thickened and lemon colored. Beat in chip mixture and extract. Combine flour and salt; gradually add to creamed mixture.
Spread half of the batter into a greased 9-in. square baking pan. Bake at 325° for 17-20 minutes or until golden brown.
Spread raspberry jam over warm crust. Stir remaining vanilla chips into the remaining batter. Spoon over raspberry layer. Sprinkle with almonds. Bake for 20-23 minutes or until toothpick comes out clean. Cool on a wire rack before cutting.