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1
Line an 8-inch square baking pan or dish with aluminum foil so that the foil hangs over the sides.
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2
Grease the foil with butter.
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3
Melt the butter Let cool for 5 minutes.
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4
Crush the crackers and make the crust You should have 1 cup of crumbs.
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5
Add the crumbs to the melted butter and stir with a wooden spoon until blended.
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6
Scrape the crumbs into the baking pan.
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7
Press in the crust.
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8
Make the chocolate filling.
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9
In a medium saucepan over medium-low heat, combine the condensed milk and chocolate chips.
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10
Heat, stirring with a wooden spoon until the chocolate is melted and the mixture is smooth.
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11
Add the vanilla and salt and stir until blended.
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12
Pour the filling over the graham cracker crust and spread evenly with the spoon.
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13
Finish the bars.
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14
Scatter the marshmallows evenly over the chocolate filling and press them in gently.
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15
If using the 2 whole graham crackers, break them into little pieces.
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16
Stick the broken crackers or mini-cracker shapes into the filling among the marshmallows.
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17
Cut the bars.
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18
Cover and refrigerate the bars until they are firm, about 4 hours.
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19
To serve, lift the foil from the pan and set the s'more square on a cutting board.
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20
Peel the foil away from the sides, and cut the square into rectangles with a sharp knife.
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21
Keep refrigerated until just before serving.
